Publication Date: 2017-05-15

Approval Date: 2016-12-07

Posted Date: 2016-10-27

Reference number of this document: OGC 16-062

Reference URL for this document: http://www.opengis.net/doc/PER/t12-A072

Category: Public Engineering Report

Editor: Gobe Hobona, Roger Brackin

Title: Testbed-12 Catalogue and SPARQL Engineering Report

Testbed-12 Catalogue and SPARQL Engineering Report (16-062)

COPYRIGHT

Copyright © 2017 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/

WARNING

This document is an OGC Public Engineering Report created as a deliverable of an initiative from the OGC Innovation Program (formerly OGC Interoperability Program). It is not an OGC standard and not an official position of the OGC membership.It is distributed for review and comment. It is subject to change without notice and may not be referred to as an OGC Standard. Further, any OGC Engineering Report should not be referenced as required or mandatory technology in procurements. However, the discussions in this document could very well lead to the definition of an OGC Standard.

LICENSE AGREEMENT

Permission is hereby granted by the Open Geospatial Consortium, ("Licensor"), free of charge and subject to the terms set forth below, to any person obtaining a copy of this Intellectual Property and any associated documentation, to deal in the Intellectual Property without restriction (except as set forth below), including without limitation the rights to implement, use, copy, modify, merge, publish, distribute, and/or sublicense copies of the Intellectual Property, and to permit persons to whom the Intellectual Property is furnished to do so, provided that all copyright notices on the intellectual property are retained intact and that each person to whom the Intellectual Property is furnished agrees to the terms of this Agreement.

If you modify the Intellectual Property, all copies of the modified Intellectual Property must include, in addition to the above copyright notice, a notice that the Intellectual Property includes modifications that have not been approved or adopted by LICENSOR.

THIS LICENSE IS A COPYRIGHT LICENSE ONLY, AND DOES NOT CONVEY ANY RIGHTS UNDER ANY PATENTS THAT MAY BE IN FORCE ANYWHERE IN THE WORLD. THE INTELLECTUAL PROPERTY IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE DO NOT WARRANT THAT THE FUNCTIONS CONTAINED IN THE INTELLECTUAL PROPERTY WILL MEET YOUR REQUIREMENTS OR THAT THE OPERATION OF THE INTELLECTUAL PROPERTY WILL BE UNINTERRUPTED OR ERROR FREE. ANY USE OF THE INTELLECTUAL PROPERTY SHALL BE MADE ENTIRELY AT THE USER’S OWN RISK. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ANY CONTRIBUTOR OF INTELLECTUAL PROPERTY RIGHTS TO THE INTELLECTUAL PROPERTY BE LIABLE FOR ANY CLAIM, OR ANY DIRECT, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM ANY ALLEGED INFRINGEMENT OR ANY LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR UNDER ANY OTHER LEGAL THEORY, ARISING OUT OF OR IN CONNECTION WITH THE IMPLEMENTATION, USE, COMMERCIALIZATION OR PERFORMANCE OF THIS INTELLECTUAL PROPERTY.

This license is effective until terminated. You may terminate it at any time by destroying the Intellectual Property together with all copies in any form. The license will also terminate if you fail to comply with any term or condition of this Agreement. Except as provided in the following sentence, no such termination of this license shall require the termination of any third party end-user sublicense to the Intellectual Property which is in force as of the date of notice of such termination. In addition, should the Intellectual Property, or the operation of the Intellectual Property, infringe, or in LICENSOR’s sole opinion be likely to infringe, any patent, copyright, trademark or other right of a third party, you agree that LICENSOR, in its sole discretion, may terminate this license without any compensation or liability to you, your licensees or any other party. You agree upon termination of any kind to destroy or cause to be destroyed the Intellectual Property together with all copies in any form, whether held by you or by any third party.

Except as contained in this notice, the name of LICENSOR or of any other holder of a copyright in all or part of the Intellectual Property shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Intellectual Property without prior written authorization of LICENSOR or such copyright holder. LICENSOR is and shall at all times be the sole entity that may authorize you or any third party to use certification marks, trademarks or other special designations to indicate compliance with any LICENSOR standards or specifications.

This Agreement is governed by the laws of the Commonwealth of Massachusetts. The application to this Agreement of the United Nations Convention on Contracts for the International Sale of Goods is hereby expressly excluded. In the event any provision of this Agreement shall be deemed unenforceable, void or invalid, such provision shall be modified so as to make it valid and enforceable, and as so modified the entire Agreement shall remain in full force and effect. No decision, action or inaction by LICENSOR shall be construed to be a waiver of any rights or remedies available to it.

None of the Intellectual Property or underlying information or technology may be downloaded or otherwise exported or reexported in violation of U.S. export laws and regulations. In addition, you are responsible for complying with any local laws in your jurisdiction which may impact your right to import, export or use the Intellectual Property, and you represent that you have complied with any regulations or registration procedures required by applicable law to make this license enforceable.

Abstract

This engineering report has been produced by the OGC® Testbed-12 initiative. The engineering report evaluates interoperability between a variety of catalogues. The report presents a comparison of the catalogues, with the same datasets uploaded. The catalogues discussed in the report include services conforming to Catalogue Service for Web (CSW) version 2.0.2 and 3.0, including services based on the ebRIM profile of CSW 2.0.2 and an extension of CSW 3.0 with OpenSearch and SOAP. The engineering report presents results from tests using a multi-catalogue client to interact with each service. The engineering report also provides a comparison of CSW and services based on the Data Catalogue (DCAT) specification covering functionality, expressiveness and usability of CSW and DCAT. The comparison is supported by a discussion on the implementation of a SPARQL / GeoSPARQL service.

Business Value

This engineering report discusses catalogue services, which are the primary means through which geospatial data and services are discovered. The engineering report also discusses SPARQL services and their potential for supporting geospatial data discovery within the Linked Data cloud. The contents of this report will therefore advance geospatial interoperability through:

  • Improved understanding of the potential for semantic enablement of OGC catalogue services

  • Greater interoperability between OGC catalogue standards and open search standards currently adopted by several general search engines

  • Increased awareness of registry capabilities such as change control management, which are supported by specific profiles of OGC catalogue standards

Technology Value

This engineering report is important to the OGC Geosemantics Domain Working Group because it advances the semantic enablement of geospatial catalogues, potentially providing a bridge between the geospatial and semantic web communities. The engineering report is also important to the OGC Catalogue Standard Working Group because it advances interoperability between different geospatial catalogues.

How does this ER relate to the work of the Working Group

During a teleconference of the GeoSemantics Domain Working Group on 20th April 2016 to discuss this engineering report, participants stated that crosswalks of the use cases supported by each catalogue service would be useful. It is envisaged that the functionality and metadata crosswalks presented in this report will inform future work of the domain working group in this area.

Keywords

ogcdocs, testbed-12, CSW, eb-RIM, catalogue, metadata, SPARQL, RDF, OWL, semantic web, linked data, DCAT.

Proposed OGC Working Group for Review and Approval

This engineering report will be submitted to the Geosemantics Domain Working Group for review.

1. Introduction

Advances in data collection and publication technologies have led to a phenomenal increase, over the past decade, in the amount of geospatial data that is available on the World Wide Web. This increase in data availability has also led to an increasing need to improve the efficiency and effectiveness of geospatial data discovery approaches. Catalogue services have been at the forefront of addressing this need by providing the means through which users can search, find and discover relevant resources. Metadata provided by catalogues presents descriptions of resource characteristics that can be assessed by both humans and software. This engineering report focuses on catalogue services based on the OGC CSW standard. The report also examines interoperability between CSW and SPARQL Services offering metadata based on the DCAT specification.

1.1. Scope

This OGC® document evaluates interoperability between the following catalogue specifications: CSW version 2.0.2, ebRIM profile of CSW version 2.0.2, and CSW version 3.0 with OpenSearch and SOAP support. The document also provides a comparison of CSW and services based on the Data Catalogue (DCAT) specification, implemented through a SPARQL Service. This OGC® document is applicable to the discovery of information resources in Spatial Data Infrastructure (SDI) and their exploitation within the Linked Data Cloud.

1.2. Document contributor contact points

All questions regarding this document should be directed to the editor or the contributors:

Table 1. Contacts
Name Organization

Gobe Hobona PhD

Envitia

Stefano Cavazzi PhD

Envitia

Roger Brackin

Envitia

Brendan Mason

Envitia

Ingo Simonis PhD

OGC

Chuck Heazel

WiSC Enterprises

Dave Wesloh

NGA

1.3. Future Work

It is expected that this document will result in editorial changes in the following documents:

  • OGC Catalogue 3.0 standard - General Model

  • OGC Catalogue 3.0 specification - HTTP Protocol Binding

The document also recommends that the following profiles be updated to be based on CSW 3.0 standard:

  • OGC I15(ISO 19115) Extension Package of CSW-ebRIM Profile 1.0

  • CSW-ebRIM Registry Service - Part 1 to 3

  • FGDC CSDGM Application Profile for CSW 2.0

  • OGC Catalogue Services Standard 2.0 Extension package for ebRIM Application Profile: Earth Observation Products

1.4. Foreword

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The Open Geospatial Consortium shall not be held responsible for identifying any or all such patent rights.

Recipients of this document are requested to submit, with their comments, notification of any relevant patent claims or other intellectual property rights of which they may be aware that might be infringed by any implementation of the standard set forth in this document, and to provide supporting documentation.

2. References

The following documents are referenced in this document. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the normative document referred to applies.

  1. OGC 06-121r9, OGC® Web Services Common Standard

  2. OGC 07-006r1, OpenGIS Catalogue Service Implementation Specification 2.0.2, 2007

  3. OGC 12-168r6, OGC® Catalogue Services 3.0 - General Model, 2016

  4. OGC 13-084r2, OGC I15 (ISO19115 Metadata) Extension Package of CS-W ebRIM Profile .0, 2014

  5. OGC 07-110r4, CSW-ebRIM Registry Service ebRIM profile of CSW (.0.1), 2009

  6. OGC 07-045, OGC Catalogue Services Specification 2.0.2 - ISO Metadata Application Profile (.0.0), 2007

  7. OGC 06-129r1, FGDC CSDGM Application Profile for CSW 2.0 (0.0.12), 2006

  8. ISO 19115:2003, Geographic information — Metadata

  9. ISO 19119:2005, Geographic information — Services

  10. ISO 19115:2003/Cor 1:2006, Geographic information — Metadata

  11. ISO/TS 19139:2007, Geographic information — Metadata — XML schema implementation

  12. ISO 19115-1:2014, Geographic information — Metadata — Part 1: Fundamentals

  13. Dublin Core Metadata Initiative, last visited 12-09-2016, available from http://dublincore.org/

  14. NSG Metadata Foundation (NMF) – Part 1: Core, version 2.2, 23 September 2014 https://nsgreg.nga.mil/doc/view?i=4123

  15. DGIWG 114, DGIWG Metadata Foundation (DMF),last visited 12-09-2016, available from https://portal.dgiwg.org/files/?artifact_id=9189&format=pdf

  16. DoD Discovery Metadata Specification (DDMS),last visited 12-09-2016, available from https://metadata.ces.mil/dse-help/DDMS/index.htm

  17. SPARQL Protocol and RDF Query Language (SPARQL),last visited 12-09-2016, available from https://www.w3.org/TR/rdf-sparql-query

  18. DCAT, last visited 12-09-2016, available from https://www.w3.org/TR/vocab-dcat/

  19. National System for Geospatial Intelligence Metadata Implementation Specification (NMIS) – Part 2: XML Exchange Schema

  20. Fellah, S., Testbed-12 Semantic Portrayal, Registry and Mediation Engineering Report (16-059), Open Geospatial Consortium, 2016

3. Terms and definitions

For the purposes of this report, the definitions specified in Clause 4 of the OWS Common Implementation Standard [OGC 06-121r9] shall apply. In addition, the following terms and definitions apply.

3.1. metadata

data about data

3.2. model

abstraction of some aspects of a universe of discourse [ISO 19109]

3.3. interoperability

capability to communicate, execute programs, or transfer data among various functional units in a manner that requires the user to have little or no knowledge of the unique characteristics of those units [ISO 19119]

3.4. syntactic interoperability

the aspect of interoperability that assures that there is a technical connection, i.e. that the data can be transferred between systems

3.5. semantic interoperability

the aspect of interoperability that assures that the content is understood in the same way in both systems, including by those humans interacting with the systems in a given context

4. Conventions

4.1. Abbreviated terms

  • eb-RIM electronic business Registry Information Model

  • CSW Catalogue Service for the Web

  • DCAT Data Catalogue

  • OGC Open Geospatial Consortium

  • OWL Web Ontology Language

  • OWS OGC Web Services

  • RDF Resource Description Framework

  • SDI Spatial Data Infrastructure

  • UML Unified Modeling Language

5. Overview

This engineering report includes the following major sections:

  • Status Quo & New Requirements Statement: This section describes current standards of catalogues and metadata.

  • Solutions: This section describes the solution architectures considered by the testbed, as well as the solution architecture implemented by the testbed.

  • Appendix sections: These sections include a functionality crosswalk for catalogues, metadata crosswalk, and sample metadata encoded according to different standards.

6. Status Quo & New Requirements Statement

6.1. Status Quo

The publish-find-bind paradigm on which much of the geospatial service architecture is based relies on the discovery of resources to enable client applications to bind to a particular service. The two most important types of technologies involved in the discovery of resources are metadata and catalogues. The following sections describe both of these concepts and provide examples to describe the status quo.

6.2. Metadata

Metadata is often defined as "data about data". It can play several roles within a Spatial Data Infrastructure (SDI), however the most important roles of metadata are to facilitate discovery, management and use of geospatial information resources such as maps, navigational charts, imagery, digital datasets and web services.

One of the oldest and most widely adopted (and adapted) metadata standards in the global computing industry is the Dublin Core specification which originally provided 15 metadata elements for describing information resources.

The most widely adopted metadata standard within the geospatial industry is the ISO 19115:2003 standard [8]. This standard specifies more than 300 metadata elements for describing geospatial datasets. A corrigendum of this standard was issued in 2006 as ISO 19115:2003/Cor 1:2006. Associated with ISO 19115 are ISO 19119:2005 which includes a specification of metadata for describing services [9] and ISO/TS 19139:2007 which provides a specification of an XML schema for encoding metadata that is based on both ISO 19115 and ISO 19119 [11]. In 2014, the ISO 19115 standard was revised to ISO 19115-1:2014 and the ISO 19119 standard was revised to ISO 19119:2014.

Several initiatives have demonstrated interoperability between the Dublin Core metadata specification and ISO 19115 through the development of crosswalks that provide mappings between the two specifications, for example Go-Geo. Whereas there are some differences in the crosswalks developed by previous initiatives, the consensus is that most of the Dublin Core elements can be mapped to an ISO 19115 metadata element that shares common meaning, even if labelled differently.

The Dublin Core and ISO 19115 metadata standards provide the foundation for all of the metadata standards that have been part of this testbed [13]. This foundation can be described in the following way:

  • The NSG Metadata Foundation (NMF) defines the conceptual schema profile for specifying geospatial metadata in and for the US National System for Geospatial Intelligence (NSG) [14]. It is a profile of ISO 19115:2003/Cor 1:2006.

  • The DGIWG Metadata Foundation (DMF) provides a general Defense metadata profile for the exchange of metadata between DGIWG member nations [15]. It is a profile of ISO 19115:2003/Cor 1:2006.

  • The DoD Discovery Metadata Specification (DDMS) specifies a set of metadata fields that are to be used for describing any information resource, that is to be made discoverable to the DoD Enterprise [16]. It is a profile of the Dublin Core metadata specification.

  • DCAT is a vocabulary based on the Resource Description Framework (RDF) and designed to facilitate interoperability between data catalogues published on the Web. It is a profile of the Dublin Core metadata specification [18].

6.3. Catalogue Services

6.3.1. OGC Catalogue Services

The OGC Catalogue Services specification provides a general interface model that describes a set of abstract service interfaces that support the discovery, access, maintenance and organization of catalogues of geospatial information resources [2]. The interfaces are designed to enable client applications or end-users to find information that exists in distributed computing environments. Version 2.0.2 of the Catalogue service standard specified three bindings that could be used to implement a conformant catalogue service, namely HTTP, CORBA, and Z39.50. The HTTP binding, which is more commonly referred to as Catalogue Services for the Web (CSW), has seen the most uptake. Several application profiles and extensions have targeted version 2.0.2 of the CSW specification, for example:

  • OGC I15 (ISO19115 Metadata) Extension Package of CS-W ebRIM Profile 1.0 [4]

  • CSW-ebRIM Registry Service ebRIM profile of CSW (1.0.1) [5]

  • OGC Catalogue Services Specification 2.0.2 - ISO Metadata Application Profile (1.0.0) [6]

  • FGDC CSDGM Application Profile for CSW 2.0 (0.0.12) [7]

Version 3.0 of the Catalogue service standard offers a number of additional capabilities to those offered by the current version of the standard. Version 3.0 also removes some of the capabilities offered by version of the standard. CSW 3.0 offers the following additional capabilities:

  • Supports OpenSearch, thereby improving interoperability with general search engines

  • Provides a comprehensive picture to support federated distributed search, addressing potential problems such as dead loop and long response time.

CSW 3.0 however removes the following capabilities:

  • Removes support for stateful communication, thereby supporting only stateless request/response exchange.

  • Deprecates the CORBA binding

6.3.2. DCAT/SPARQL Service

The DCAT specification is designed to facilitate the discovery of datasets between catalogues. The DCAT specification does not standardize a service interface but instead standardizes a vocabulary for describing resources. It therefore aligns more with ISO 19115 and not ISO 19119. To understand how it relates or compares to OGC catalogue services, it is necessary to examine SPARQL services, which are the service interfaces that are recommended for delivering DCAT metadata.

The SPARQL Protocol and RDF Query Language (SPARQL) is a query language and protocol for RDF [17]. The protocol allows for querying or updating an RDF graph through an HTTP interface. An associated specification describes an additional protocol, the Graph Store protocol, which describes the management of a collection of graphs in a RESTful architectural approach.

These specifications are part of a series of standards that collectively define the SPARQL service standard which provides the interface for publishing and accessing DCAT metadata within this testbed. The complete set of SPARQL specifications includes:

  1. SPARQL 1.1 Overview

  2. SPARQL 1.1 Query Language

  3. SPARQL 1.1 Update

  4. SPARQL1.1 Service Description

  5. SPARQL 1.1 Federated Query

  6. SPARQL 1.1 Query Results JSON Format

  7. SPARQL 1.1 Query Results CSV and TSV Formats

  8. SPARQL Query Results XML Format (Second Edition)

  9. SPARQL 1.1 Entailment Regimes

  10. SPARQL 1.1 Protocol

  11. SPARQL 1.1 Graph Store HTTP Protocol

An example of a federated query is shown below. The query is sent to the SPARQL services at the URLs specified by the SERVICE keyword. In this case, the queries sent to the remote services are for all triples that contain objects of dcat:Dataset.

SPARQL federated query
SELECT  ?dataset
WHERE
{
  {
    SERVICE <http://localhost/ds1/query> {
   ?dataset ?predicate <http://www.w3.org/ns/dcat#Dataset> .
  }
  }
  UNION
  {
    SERVICE <http://localhost/ds3/query> {
   ?dataset ?predicate <http://www.w3.org/ns/dcat#Dataset> .
  }
  }
}

6.4. Requirements Statement

Differences in capability and interfaces between services in multi-catalogue environments can at times prevent interoperability. It is therefore necessary to understand what those differences are and how best their impact can be mitigated.

Testbed-12 therefore undertook to address the following requirement:

  • Advance use of the Catalogue Service for the Web (CSW) standard through evaluation of catalogue interoperability: This work item shall load the same dataset to a set of catalogues and test, using a multi-catalogue client, the interaction with each service to better understand interoperability aspects in multi-catalogue environments. The work item shall also evaluate the various DCAT contexts including RDF accessible via SPARQL endpoints, embedded in HTML pages as RDFa, or serialized as e.g. RDF/XML or Turtle and compare functionality, expressiveness and usability of CSW and DCAT. In addition, capture all discussion related to the implementation of the SPARQL / GeoSPARQL Server.

To address this requirement, the following objectives we set out.

  • Evaluate interoperability aspects in multi-catalogue type environments, including CSW featuring ISO based metadata and OpenSearch, a second CSW offering a SOAP binding, and a third DCAT implementation, describing the same services and data sets using RDF.

  • Evaluate how DCAT can describe the same service and data sets in RDF as the other catalog services do using XML Schema Documents (XSD) compliant to ISO 1939 and ISO 19115.

  • The CSW v3.0 server shall support OpenSearch, provide a SOAP binding, consider the recommendations on PyCSW referenced and discussed in Testbed-11, and implement the NSG Metadata framework.

  • The DCAT implementation shall serve as a Semantic Portrayal Catalogue. The Semantic Portrayal Catalogue uses an ontology model for managing styles and provides interfaces to access, create, read, update, and delete styles.

  • DCAT as a service shall interface with the Schema Registry which enables the discovery of XML schemas, transformation logic, and ontologies.

  • Implement four different catalogues (CSW 3.0, CSW 2.0.2, CSW ebRIM, DCAT) and show how they can interact. Demonstrate what role DCAT can play.

  • Consider Testbed-11 recommendations related to PyCSW.

7. Solutions

7.1. Targeted Solutions

7.1.1. Interoperability in Multi-catalogue Environments

To evaluate interoperability aspects in multi-catalog type environments, the testbed considered a number of solution options. All of the solution options could involve various types of catalogue services, for example, CSW featuring ISO based metadata and OpenSearch, other CSW offering a SOAP binding, and support for DCAT using RDF.

There are several architectural solutions that could be used to establish a multi-catalogue environment. Four key architectural solutions were identified by the Testbed. The identified solutions differ in a variety of ways, including the entry point for client applications and the computational balance between the client application and the services.

The first solution for a multi-catalogue environment includes a client application that can query the various catalogue services directly. This requires the client application to prepare appropriate queries for each catalogue service and to integrate the search results when they are returned by the services.

Option 1
Figure 1. Multi-catalog Environment

The second solution involves the selection of one of the catalogue services to initiate a distributed search. In this case, the client application only needs to prepare queries for sending to the cascading catalogue service. Upon receiving a request from the client, the cascading catalogue service adapts the request for forwarding to other catalogue services and returns responses from the other services, as well as results from its own catalogue.

Option 2
Figure 2. Catalog with distributed search

The third solution involves the harvesting of metadata into a single target catalogue service by retrieving metadata from one or more source catalogue services. Harvesting is ideally conducted at a scheduled time and not at the time of receiving a query from the client. The client application can then query the target catalogue service to discover resources published by the source and target catalogue services.

Option 3
Figure 3. Harvest metadata into a single target catalog

The fourth solution involves the replication of metadata between a federation of catalogue services. Replication would ideally be conducted at a scheduled time and not at the time of receiving a query from the client. The client application can then query any of the catalogue services to discover resources published by any of the catalogue services.

Option 4
Figure 4. Replicate metadata in a federation of catalog services

The testbed also developed a crosswalk of functionality between the different catalogues. The functionality crosswalk is presented in Appendix A.

7.1.2. Describing Services and Datasets using DCAT

To evaluate how DCAT can describe the same services and datasets in RDF as the other catalogue services do using XML Schema instance documents compliant to ISO 19115, the testbed participants produced a crosswalk between ISO profiles and DCAT. The crosswalk, which is presented in Appendix B, was informed by work done by the European Commission on developing a geospatial profile for DCAT (alias GeoDCAT). The metadata model provided by DCAT includes classes and attributes for identifying and describing catalogues, datasets, catalogue records, publishing agents and distribution. The metadata model does not include any classes or attributes for identifying or describing services. The absence of classes and attributes for service metadata in DCAT meant that several ISO service metadata elements did not have equivalent fields in DCAT to map to.

The testbed also designed a Semantic Registry Information Model (SRIM) by extending the DCAT model to include concepts from ISO 19135, the international standard for procedures for item registration in geographic information systems. Engineering Report A066 Semantic Portrayal Registry Mediation Services (16-059) describes and discusses the SRIM.

7.1.3. Consideration of Testbed-11 PyCSW Recommendations

Testbed-11 implemented a CSW 3.0 with OpenSearch support using PyCSW - an open source OGC CSW implementation that allows publishing and sharing of geospatial metadata. PyCSW is a library for enabling Python applications to offer CSW interfaces, as well as OpenSearch, OAI-PMH and SRU. A key aspect of the Testbed-11 work was enabling the CSW to advertise its service interface through an OpenSearch description document. Parameters allowed by an OpenSearch-enabled service interface are published through OpenSearch description documents. Client applications use these description documents to determine how to search the catalogue offered by the OpenSearch-enabled service.

Testbed-11 found that the web browser selected for the Testbed-11 work was not able to view the OpenSearch description document because of the document’s MIME type (opensearchdescription+xml). The testbed therefore implemented a JavaScript module (AJAX specifically) to request and download the description document for viewing.

Testbed-11 recommended that "the catalog provider implements CSW 3.0 as their catalogue [service] due to CSW 3.0’s advance[d] support for OpenSearch, distributed search and federated search".

7.2. Recommendations

Having considered the solution options, the testbed selected a hybrid of Option 2 and Option 3 - taking the DCAT/GeoSPARQL Service as the mediating catalogue service. This engineering report refers to the approach as a hybrid approach because the mediating DCAT/GeoSPARQL service harvested metadata from the CSW, but allowed for cascading requests to other GeoSPARQL Services.

SelectedOption
Figure 5. DCAT/GeoSPARQL service mediating catalog services

Based on this work, the testbed makes the following recommendations:

Ref. Findings and Observations Recommendation

1

DCAT on its own has a limited geospatial vocabulary. However, when integrated with GeoSPARQL to create GeoDCAT it provides a geospatial vocabulary capable of supporting catalogue federation

The OGC should standardize the GeoDCAT specification

2

The metadata returned by the different catalogues ranged from ISO 19139 XML, NMIS, DDMS, ebRIM ExtrisicObjects etc. There is therefore a need to allow the catalogues to return the metadata in a common language, as an alternative to recommendation 2.

The CSW services should be enabled to offer a GeoSPARQL service endpoint that publishes metadata in GeoDCAT and can receive federated SPARQL queries from other GeoSPARQL services

3

Annex G.1 of the DGIWG Metadata Foundation (DMF) identifies compatible metadata from the CIM extension of CSW ebRIM application profile. However, the I15 model supersedes the former document OGC Cataloguing of ISO Metadata (CIM) using the ebRIM profile of CSW, OGC 07-038r3 (Version: 0.1.12).

Update the DGIWG Metadata Foundation (DMF) to include a crosswalk to I15.

4

To query all of the different catalogues using the same request, the request has to be first translated into the language supported by each catalogue. In order to computationally make inferences about the metadata that is returned by the different catalogues it is necessary to convert the responses into the same language. Several of the queryable metadata fields (e.g. title, identifier, description, keywords, date and spatial elements) have mappings between DMF and DCAT. It is possible to export metadata from each catalogue into DCAT, thereby enabling a SPARQL Service to query across all of the metadata from all of the catalogues with a single query.

Include an Annex in the DMF on DCAT/GeoDCAT representation to allow DGIWG-based CSW to optionally offer SPARQL endpoints that offer DCAT-encoded metadata.

5

One of the goals of DGIWG is to support geospatial interoperability between NATO member states. The NATO Interoperability Standards and Profiles (NISP) document published June 6th 2016, lists the following specifications as mandatory core enterprise services for information discovery: SPARQL 1.1 Query Language:2012 (W3C), Web Ontology Language (OWL):2009, W3C. OWL on its own does not specify the metadata elements to use to describe datasets or services. Therefore it is necessary to provide further constraints on the vocabulary (metadata elements) to use with OWL.

Any representation of dataset metadata using OWL or its publishing through SPARQL should adopt the DCAT/GeoDCAT vocabulary.

6

The NISP document lists the following specifications as emerging core enterprise services for information discovery: OpenSearch 1.1, OpenSearch; ISAF Minimum Metadata Implementation Policy (NATO:2010); OWL-S. OGC Testbed-12 observes that CSW 3.0 supports OpenSearch, implying that can support the NISP requirement.

Put CSW 3.0 forward for endorsement by the next version of NISP. This would be consistent with the current version of NISP since it lists OpenSearch support as mandatory.

7

Since CSW 3.0 is relatively new, many of the profiles that made CSW 2.0.2 a success have not yet been adapted for CSW 3.0.

Adapt profiles of CSW 2.0.2 to CSW 3.0. For example: (1) FGDC CSDGM Application Profile for CSW 2.0 ; (2) OGC® Catalogue Services Standard 2.0 Extension Package for ebRIM Application Profile: Earth Observation Products; and (3) OGC I15 (ISO19115 Metadata) Extension Package of CS-W ebRIM Profile 1.0

Appendix A: Functionality Crosswalk

The assessment carried out in Testbed-12 to determine interoperability between CSW variants and SPARQL Services is shown in Table 1.A.1. This table is intended to state whether a service supports a particular function, how it supports the function (concisely) and if support is partial which aspects are not supported.

Table 2. A.1 Assessment Scheme
Function CSW-ebRIM with I15 from NMF, DMF and DDMS CSW 2.0.2 with DMF CSW 3.0 with NMF, Open Search and SOAP SPARQL Service with DCAT

Repository

Supported

Not Supported

Not Supported

Not Supported

Basic Query

Supported through GetRecords, GetRecordById operations

Supported through GetRecords, GetRecordById operations

Supported through GetRecords, GetRecordById operations

Supported through SELECT, CONSTRUCT queries

Geospatial Query

Supported through GetRecords, GetRecordById operations

Supported through GetRecords, GetRecordById operations

Supported through GetRecords, GetRecordById operations

Supported through a GeoSPARQL predicate in a FILTER query modifier.

Federated Query

This extension package does not support the ability to distribute a client request to other catalogues within a federation. But, an ebRIM catalogue can manage registry objects corresponding to resources managed in one or more item repositories. See OGC 13-084r2 Section 12.7

Supported through Distributed Search. See OGC 07-006r1 Section 10.8.4.13

Supported through Distributed Search. See Annex A of OGC document 12-168r6.

The SPARQL Federated Query extension allows a query author to direct a portion of a query to a particular SPARQL endpoint. Results are returned to the federated query processor and are combined with results from the rest of the query. See the W3C SPARQL Federated Query specification.

Types of Query

GetCapabilities (maps to SPARQL DESCRIBE)

DescribeRecord (maps to SPARQL DESCRIBE)

GetDomain (maps to SPARQL SELECT)

GetRecords (maps to SPARQL SELECT)

GetRecordById (maps to SPARQL SELECT)

GetRepositoryItem (no match)

Transaction (maps to SPARQL UPDATE, INSERT, DELETE)

Harvest (maps to SPARQL INSERT)

StoredQuery (no match)

GetCapabilities (maps to SPARQL DESCRIBE)

DescribeRecord (maps to SPARQL DESCRIBE)

GetDomain (maps to SPARQL SELECT)

GetRecords (maps to SPARQL SELECT)

GetRecordById (maps to SPARQL SELECT)

Transaction (maps to SPARQL UPDATE, INSERT, DELETE)

Harvest (maps to SPARQL INSERT)

GetCapabilities (maps to SPARQL DESCRIBE)

DescribeRecord (maps to SPARQL DESCRIBE)

GetDomain (maps to SPARQL SELECT)

GetRecords (maps to SPARQL SELECT)

GetRecordById (maps to SPARQL SELECT)

Transaction (maps to SPARQL UPDATE, INSERT, DELETE)

Harvest (maps to SPARQL INSERT)

UnHarvest (no match)

OpenSearch query (maps to SPARQL SELECT)

OpenSearch description document (maps to SPARQL DESCRIBE)

SPARQL SELECT (maps to cswGetRecords, cswGetRecordById, cswGetDomain)

SPARQL CONSTRUCT (no match)

SPARQL ASK (maps to cswGetRecords - Brief)

SPARQL DESCRIBE (maps to cswDescribeRecord)

SPARQL DELETE (maps to cswTransaction)

Query Modifiers

SortBy (maps to SPARQL Order)

startRecords (maps to SPARQL Offset)

maxRecords (maps to SPARQL Limit)

SortBy (maps to SPARQL Order)

startRecords (maps to SPARQL Offset)

maxRecords (maps to SPARQL Limit)

SortBy (maps to SPARQL Order)

distributedSearch

responseHandler

requestId

resultType

outputFormat

outputSchema

startPosition (maps to SPARQL Offset)

maxRecords (maps to SPARQL Limit)

HopCount

ClientId

DistributedSearchId

DistrubutedSearchIdTimout

FederatedCatalogues

Order (maps to cswSortBy)

Projection modifier: choose certain variables

Distinct (maps to filterArithmetic_Operators-DISTINCT)

Reduced modifier: permit elimination of some non-unique solutions

Offset (maps to cswStartRecords)

Limit (maps to cswMaxRecords)

Entailment Regimes

Not Supported

Not Supported

Not Supported

Supported

Service Description

GetCapabilities

GetCapabilities

* GetCapabilities

*Also by accessing the base URL of a conforming catalogue using the HTTP GET method (as specified in the OpenSearch conformance class).

SPARQL services made available via the SPARQL Protocol should return a service description document at the service endpoint when dereferenced using the HTTP GET operation without any query parameter strings provided.

Data Description

DescribeRecord

DescribeRecord

DescribeRecord

SPARQL DESCRIBE

Relations between Resources

Supported through the ebRIM Associations class

Not Supported

Supported through the Association compound element

Supported through predicates between subjects and objects

Change Control Management

Supported

Not Supported

Not Supported

Not Supported

Appendix B: Metadata Crosswalk

The following crosswalk assesses interoperability between the different metadata specifications applied by CSW and SPARQL services in the testbed.

Table 3. Resource Offline Distribution Medium
Specification Element

DDMS

No appropriate mapping

ID

1

I15 ebRIM

No appropriate mapping

ISO

distributionInfo//transferOptions//offLine/*

ISO XPath

/gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:offLine/gmd:MD_Medium

NMF

No appropriate mapping

DMF

Resource Offline Distribution Medium (RSOFDM)

DCAT

dcat:Distribution property dcat:mediaType
Table 4. Metadata Set Identifier
Specification Element

DDMS

No appropriate mapping

ID

2

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="http://purl.org/dc/elements/1.1/identifier"]

ISO

fileIdentifier

ISO XPath

/gmd:MD_Metadata/gmd:fileIdentifier

NMF

fileIdentifier

DMF

Metadata Set Identifier (MDSID)

DCAT

No appropriate mapping
Table 5. Parent Metadata Set Identifier
Specification Element

DDMS

No appropriate mapping

ID

3

I15 ebRIM

/rim:Association[@associationType="urn:ogc:def:ebRIM-AssociationType:OGC:ParentMetadataInformation"]

ISO

parentIdentifier

ISO XPath

/gmd:MD_Metadata/gmd:parentIdentifier

NMF

parentIdentifier

DMF

Parent Metadata Set Identifier (MDPTSID)

DCAT

No appropriate mapping
Table 6. Resource Type Code
Specification Element

DDMS

No appropriate mapping

ID

4

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::DatasetMetadata"] /wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::ServiceMetadata"] /wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::Application"]

ISO

hierarchyLevel

ISO XPath

/gmd:MD_Metadata/gmd:hierarchyLevel

NMF

hierarchyLevel

DMF

Resource Type Code (RSTYPE)

DCAT

No appropriate mapping
Table 7. Resource Type Name
Specification Element

DDMS

No appropriate mapping

ID

5

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="http://purl.org/dc/terms/type"]

ISO

hierarchyLevelName

ISO XPath

/gmd:MD_Metadata/gmd:hierarchyLevelName

NMF

hierarchyLevelName

DMF

Resource Type Name (RSTYPN)

DCAT

No appropriate mapping
Table 8. Metadata Translation
Specification Element

DDMS

No appropriate mapping

ID

6

I15 ebRIM

No appropriate mapping

ISO

locale/*

ISO XPath

/gmd:MD_Metadata/gmd:locale

NMF

No appropriate mapping

DMF

Metadata Translation (MDTLOC)

DCAT

No appropriate mapping
Table 9. Metadata Responsible Party
Specification Element

DDMS

No appropriate mapping

ID

7

I15 ebRIM

/rim:Organization

ISO

contact/*

ISO XPath

/gmd:MD_Metadata/gmd:contact/

NMF

contact/*

DMF

Metadata Responsible Party (MDRPTY)

DCAT

dcat:Dataset property dcat:contactPoint
Table 10. Metadata Date Stamp
Specification Element

DDMS

ddms:temporalCoverage

ID

8

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="http://purl.org/dc/elements/1.1/date"]

ISO

dateStamp

ISO XPath

/gmd:MD_Metadata/gmd:dateStamp

NMF

dateStamp

DMF

Metadata Date Stamp (MDDATE)

DCAT

dcat:Dataset property dct:temporal
Table 11. Metadata Security Constraint
Specification Element

DDMS

ddms:security

ID

9

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::SecurityConstraints"]

ISO

metadataConstraints/MD_SecurityConstraints

ISO XPath

/gmd:MD_Metadata/gmd:metadataConstraints/gmd:MD_SecurityConstraints

NMF

Extended from ISO

DMF

Metadata Security Constraint (MDSCST)

DCAT

No appropriate mapping
Table 12. Metadata Releasability Addressee
Specification Element

DDMS

No appropriate mapping

ID

10

I15 ebRIM

No appropriate mapping

ISO

metadataConstraints/NGMP_Constraints/releasability/NGMP_Releasability/addressee/*/organisationName

ISO XPath

DMF Extension

NMF

No appropriate mapping

DMF

Metadata Releasability Addressee (MDREL)

DCAT

No appropriate mapping
Table 13. Metadata Legal Constraint
Specification Element

DDMS

ddms:rights

ID

11

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::LegalConstraints"]

ISO

metadataConstraints/MD_LegalConstraints

ISO XPath

/gmd:MD_Metadata/gmd:metadataConstraints/gmd:MD_LegalConstraints

NMF

metadataConstraints/MD_LegalConstraints

DMF

Metadata Legal Constraint (MDLCST)

DCAT

dcat:Distribution property dct:rights
Table 14. Metadata Maintenance Frequency
Specification Element

DDMS

No appropriate mapping

ID

12

I15 ebRIM

No appropriate mapping

ISO

metadataMaintenance/*/maintenanceAndUpdateFrequency

ISO XPath

/gmd:MD_Metadata/gmd:metadateMaintenance/gmd:MD_MaintenanceInformation/gmd:maintenanceAndUpdateFrequency

NMF

metadataMaintenance/*/maintenanceAndUpdateFrequency

DMF

Metadata Maintenance Frequency (MDMFRQ)

DCAT

dcat:Dataset property dcat:accrualPeriodicity
Table 15. Resource Title
Specification Element

DDMS

ddms:title

ID

13

I15 ebRIM

/wrs:ExtrinsicObject/rim:Name

ISO

identificationInfo[1]//citation//title

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:citation/gmd:CI_Citation/gmd:title

NMF

identificationInfo[1]//citation//title

DMF

Resource Title (RSTITLE)

DCAT

dcat:Dataset property dct:title
Table 16. Resource Alternate Title
Specification Element

DDMS

ddms:subtitle

ID

14

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="http://purl.org/dc/terms/title"]

ISO

identificationInfo[1]//citation//alternateTitle

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_Identification/gmd:citation/gmd:CI_Citation/gmd:alternativeTitle

NMF

identificationInfo[1]//citation//alternateTitle

DMF

Resource Alternate Title (RSALT)

DCAT

No appropriate mapping
Table 17. Resource Abstract
Specification Element

DDMS

ddms:description

ID

15

I15 ebRIM

/wrs:ExtrinsicObject/rim:Description

ISO

identificationInfo[1]/*/abstract

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_Identification/gmd:abstract

NMF

identificationInfo[1]/*/abstract

DMF

Resource Abstract (RSABSTR)

DCAT

dcat:Dataset property dct:description
Table 18. Resource Purpose
Specification Element

DDMS

No appropriate mapping

ID

16

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]/*/purpose

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_Identification/gmd:purpose

NMF

No appropriate mapping

DMF

Resource Purpose (RSPURP)

DCAT

No appropriate mapping
Table 19. Resource Edition
Specification Element

DDMS

No appropriate mapping

ID

17

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//citation//edition

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_Identification/gmd:citation/gmd:CI_Citation/gmd:edition

NMF

No appropriate mapping

DMF

Resource Edition (RSED)

DCAT

No appropriate mapping
Table 20. Resource Edition Date
Specification Element

DDMS

No appropriate mapping

ID

18

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//citation//editionDate

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_Identification/gmd:citation/gmd:CI_Citation/gmd:editionDate

NMF

No appropriate mapping

DMF

Resource Edition Date (RSEDDAT)

DCAT

dcat:Dataset property dct:issued
Table 21. Resource Identifier
Specification Element

DDMS

ddms:identifier

ID

19

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="http://purl.org/dc/elements/1.1/identifier"]

ISO

identificationInfo[1]//citation//identifier[not(/codeSpace=RSSERI)]/

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:identifier

NMF

identificationInfo[1]//citation//identifier[not(/codeSpace=RSSERI)]/

DMF

Resource Identifier (RSID)

DCAT

dcat:Dataset property dct:identifier
Table 22. Resource Keyword Set
Specification Element

DDMS

ddms:keyword

ID

20

I15 ebRIM

/rim:ClassificationNode[@parent="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeDiscipline"]

ISO

identificationInfo[1]//descriptiveKeywords[not(/thesaurusName//title=NGMP_GeospatialInformationTypeCode) and not(/thesaurusName//title=NGMP_GeoreferencingLevelCode) and not(/thesaurusName//title=NGMP_RepresentationFormCode) and not(/thesaurusName//title=NGMP_DataLevelCode) and not(/thesaurusName//title=NGMP_ThematicCode)]/

ISO XPath

/gmd:MD_Metadata/gmd:identificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords[not(/thesaurusName//title=NGMP_GeospatialInformationTypeCode) and not(/thesaurusName//title=NGMP_GeoreferencingLevelCode) and not(/thesaurusName//title=NGMP_RepresentationFormCode) and not(/thesaurusName//title=NGMP_DataLevelCode) and not(/thesaurusName//title=NGMP_ThematicCode)]/

DMF

Resource Keyword Set (RSKWDS)

DCAT

dcat:Dataset property dcat:keyword
Table 23. Resource Product Specification
Specification Element

DDMS

No appropriate mapping

ID

21

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::Conformance"]

ISO

dataQualityInfo//report [ /nameOfMeasure=Product specification compliancy and */measureDescription=This describes the product specification the resource is conformant to. and */result/DQ_ConformanceResult/explanation=Product specification and */result/DQ_ConformanceResult/pass=true] //result/DQ_ConformanceResult/specification/

ISO XPath

No appropriate mapping

NMF

No appropriate mapping

DMF

Resource Product Specification (RSPSPC)

DCAT

No appropriate mapping
Table 24. Resource Thumbnail
Specification Element

DDMS

No appropriate mapping

ID

22

I15 ebRIM

/rim:Association[@associationType="urn:ogc:def:ebRIM-AssociationType:OGC:GraphicOverview"]

ISO

identificationInfo[1]//graphicOverview [ */fileDescription=thumbnail] //fileName

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:graphicOverview/gmd:MD_BrowseGraphic

NMF

No appropriate mapping

DMF

Resource Thumbnail (THUMB)

DCAT

No appropriate mapping
Table 25. Resource Graphics
Specification Element

DDMS

No appropriate mapping

ID

23

I15 ebRIM

/rim:Association[@associationType="urn:ogc:def:ebRIM-AssociationType:OGC:GraphicOverview"]

ISO

identificationInfo[1]//graphicOverview[not(/fileDescription=thumbnail)]/*

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:graphicOverview/gmd:MD_BrowseGraphic

NMF

No appropriate mapping

DMF

Resource Graphics (GPHICS)

DCAT

No appropriate mapping
Table 26. Resource Equivalent Scale
Specification Element

DDMS

No appropriate mapping

ID

24

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::ScaleDenominator"]

ISO

identificationInfo[1]//spatialResolution//equivalentScale/*/denominator

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:spatialResolution/gmd:MD_Resolution/gmd:equivalentScale/gmd:MD_RepresentativeFraction/gmd:denominator

NMF

identificationInfo[1]//spatialResolution//equivalentScale/*/denominator

DMF

Resource Equivalent Scale (RSSCALE)

DCAT

No appropriate mapping
Table 27. Resource Ground Sample Distance
Specification Element

DDMS

No appropriate mapping

ID

25

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::Resolution"]

ISO

identificationInfo[1]//spatialResolution//distance/*

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:spatialResolution/gmd:MD_Resolution/gmd:distance/gco:distance

NMF

identificationInfo[1]//spatialResolution//distance/*

DMF

Resource Ground Sample Distance (RSGSD)

DCAT

No appropriate mapping
Table 28. Resource Spatial Representation Type
Specification Element

DDMS

No appropriate mapping

ID

26

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::SpatialRepresentation"]

ISO

identificationInfo[1]/*/spatialRepresentationType

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:spatialRepresentationType

NMF

identificationInfo[1]/*/spatialRepresentationType

DMF

Resource Spatial Representation Type (RSRPTP)

DCAT

No appropriate mapping
Table 29. Geospatial Information Type
Specification Element

DDMS

ddms:keyword

ID

27

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeTheme"]

ISO

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_GeospatialInformationTypeCode] //keyword

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_GeospatialInformationTypeCode] //keyword

DMF

Geospatial Information Type (DGITYP)

DCAT

dcat:Dataset property dcat:keyword
Table 30. Resource Georeferencing Level
Specification Element

DDMS

ddms:keyword

ID

28

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeTheme"]

ISO

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_GeoreferencingLevelCode] //keyword

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_GeoreferencingLevelCode] //keyword

DMF

Resource Georeferencing Level (RSGFLV)

DCAT

dcat:Dataset property dcat:keyword
Table 31. Resource Representation Form
Specification Element

DDMS

ddms:keyword

ID

29

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeTheme"]

ISO

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_RepresentationFormCode] //keyword

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_RepresentationFormCode] //keyword

DMF

Resource Representation Form (RSPREF)

DCAT

dcat:Dataset property dcat:keyword
Table 32. Resource Data Level
Specification Element

DDMS

ddms:keyword

ID

30

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeTheme"]

ISO

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_DataLevelCode] //keyword

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_DataLevelCode] //keyword

DMF

Resource Data Level (RSDTLVL)

DCAT

dcat:Dataset property dcat:keyword
Table 33. Resource Topic Category
Specification Element

DDMS

ddms:category

ID

31

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::TopicCategory"]

ISO

identificationInfo[1]/*/topicCategory

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:topicCategory

NMF

identificationInfo[1]/*/topicCategory

DMF

Resource Topic Category (RSTOPIC)

DCAT

dcat:Dataset property dcat:keyword
Table 34. Resource Theme
Specification Element

DDMS

ddms:keyword

ID

32

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::KeywordSchemeTheme"]

ISO

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_ThematicCode] //keyword

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords

NMF

identificationInfo[1]//descriptiveKeywords [ /thesaurusName//title=NGMP_ThematicCode] //keyword

DMF

Resource Theme (RSTHEME)

DCAT

dcat:Dataset property dcat:theme
Table 35. Name of Resource Series
Specification Element

DDMS

No appropriate mapping

ID

33

I15 ebRIM

rim:ExternalIdentifier

ISO

identificationInfo[1]//citation//series/*/name

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:series/gmd:CI_Series/gmd:name

NMF

No appropriate mapping

DMF

Name of Resource Series (RSSERI)

DCAT

No appropriate mapping
Table 36. Resource Sheet Name
Specification Element

DDMS

No appropriate mapping

ID

34

I15 ebRIM

rim:ExternalIdentifier

ISO

identificationInfo[1]//citation//identifier [ /codeSpace=RSSERI] //code

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:code

NMF

identificationInfo[1]//citation//identifier [ /codeSpace=RSSERI] //code

DMF

Resource Sheet Name (RSSHNA)

DCAT

No appropriate mapping
Table 37. Resource Environment Description
Specification Element

DDMS

No appropriate mapping

ID

35

I15 ebRIM

rim:ExternalIdentifier

ISO

identificationInfo[1]/*/environmentDescription

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:environmentDescription

NMF

No appropriate mapping

DMF

Resource Environment Description (RSENVD)

DCAT

No appropriate mapping
Table 38. Resource Remark
Specification Element

DDMS

No appropriate mapping

ID

36

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::SupplementalInformation"]

ISO

identificationInfo[1]/*/supplementalInformation

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:supplementalInformation

NMF

No appropriate mapping

DMF

Resource Remark (RSREM)

DCAT

No appropriate mapping
Table 39. Resource Format
Specification Element

DDMS

ddms:format

ID

37

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::FormatNameAndVersion"]

ISO

identificationInfo[1]//resourceFormat[1]/

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:resourceFormat/gmd:MD_Format

NMF

identificationInfo[1]//resourceFormat[1]/

DMF

Resource Format (RSFMT)

DCAT

dcat:Distribution property dct:format
Table 40. Service Type
Specification Element

DDMS

No appropriate mapping

ID

38

I15 ebRIM

rim:Classification

ISO

identificationInfo[1]/*/serviceType

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:servicetype

DMF

Service Type (SRTYPE)

DCAT

No appropriate mapping
Table 41. Service Type Version
Specification Element

DDMS

No appropriate mapping

ID

39

I15 ebRIM

rim:Classification

ISO

identificationInfo[1]/*/serviceTypeVersion

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:ServiceTypeVersion

DMF

Service Type Version (SRTVER)

DCAT

No appropriate mapping
Table 42. Service Coupling Type
Specification Element

DDMS

No appropriate mapping

ID

40

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::CouplingType"]

ISO

identificationInfo[1]/*/couplingType

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:couplingType

DMF

Service Coupling Type (SRCPLING)

DCAT

No appropriate mapping
Table 43. Resource Operated by the Service
Specification Element

DDMS

No appropriate mapping

ID

41

I15 ebRIM

/wrs:ExtrinsicObject[@objectType=urn:ogc:def:ebRIM-ObjectType:OGC-I15::DataMetadata"]

ISO

identificationInfo[1]/*/operatesOn

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:operatesOn

DMF

Resource Operated by the Service (SROPRS)

DCAT

No appropriate mapping
Table 44. Service Operation
Specification Element

DDMS

No appropriate mapping

ID

42

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::ServiceOperation"]

ISO

identificationInfo[1]//containsOperation/

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:containsOperations

DMF

Service Operation (SROPER)

DCAT

No appropriate mapping
Table 45. Service Coupled Resource
Specification Element

DDMS

No appropriate mapping

ID

43

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//coupledResource/

ISO XPath

Not in 19139

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/srv:SV_ServiceIdentification/svr:coupledResource/svr:SV_CoupledResource

DMF

Service Coupled Resource (SRCORS)

DCAT

No appropriate mapping
Table 46. Spatial Representation of a Georectified Gridded Coverage
Specification Element

DDMS

No appropriate mapping

ID

44

I15 ebRIM

No appropriate mapping

ISO

spatialRepresentationInfo/MD_Georeferencable

ISO XPath

/gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georeferenceable/gmd:axisDimensionProperties

NMF

spatialRepresentationInfo/MD_Georeferencable

DMF

Spatial Representation of a Georectified Gridded Coverage (GRSPREP)

DCAT

No appropriate mapping
Table 47. Content Information of the Coverage
Specification Element

DDMS

No appropriate mapping

ID

45

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="name="http://purl.org/dc/elements/1.1/coverage"]

ISO

contentInfo/*

ISO XPath

/gmd:MD_Metadata/gmd:contentInfo/gmd:MD_CoverageDescription

NMF

contentInfo/*

DMF

Content Information of the Coverage (GRCINF)

DCAT

No appropriate mapping
Table 48. Topology Level
Specification Element

DDMS

No appropriate mapping

ID

46

I15 ebRIM

No appropriate mapping

ISO

spatialRepresentationInfo/MD_VectorSpatialRepresentation/topologyLevel

ISO XPath

/gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:topologyLevel

NMF

spatialRepresentationInfo/MD_VectorSpatialRepresentation/topologyLevel

DMF

Topology Level (VCTOLVL)

DCAT

No appropriate mapping
Table 49. Geometric Object
Specification Element

DDMS

No appropriate mapping

ID

47

I15 ebRIM

No appropriate mapping

ISO

spatialRepresentationInfo/MD_VectorSpatialRepresentation/geometricObjects/*

ISO XPath

/gmd:MD_Metadata/gmd:spatialRepresentationInfo/gmd:MD_VectorSpatialRepresentation/gmd:geometricObjects

NMF

No appropriate mapping

DMF

Geometric Object (VGEOM)

DCAT

No appropriate mapping
Table 50. Feature Catalogue Description
Specification Element

DDMS

No appropriate mapping

ID

48

I15 ebRIM

No appropriate mapping

ISO

contentInfo/*

ISO XPath

/gmd:MD_Metadata/gmd:contentInfo/gmd:MD_FeatureCatalogueDescription

NMF

contentInfo/*

DMF

Feature Catalogue Description (FCDESC)

DCAT

dcat:Catalog property dct:description
Table 51. Resource Extent
Specification Element

DDMS

ddms:GeospatialExtent

ID

49

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::Envelope"]

ISO

identificationInfo[1]//extent/

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent

NMF

identificationInfo[1]//extent/

DMF

Resource Extent (RSEXT)

DCAT

dcat:Dataset property dct:spatial
Table 52. Resource Reference System
Specification Element

DDMS

No appropriate mapping

ID

50

I15 ebRIM

No appropriate mapping

ISO

referenceSystemInfo//referenceSystemIdentifier//code/*

ISO XPath

/gmd:MD_Metadata/gmd:referenceSystemInfo/gmd:MD_ReferenceSystem/gmd:referenceSystemIdentifier/gmd:RS_identifier

NMF

referenceSystemInfo//referenceSystemIdentifier//code/*

DMF

Resource Reference System (RSRSYS)

DCAT

No appropriate mapping
Table 53. Resource Status
Specification Element

DDMS

No appropriate mapping

ID

51

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]/*/status

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:status

NMF

No appropriate mapping

DMF

Resource Status (RSSTAT)

DCAT

No appropriate mapping
Table 54. Resource Reference Date
Specification Element

DDMS

ddms:dates

ID

52

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//citation//date/*

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:citation/gmd:CI_Citation/gmd:date

NMF

identificationInfo[1]//citation//date/*

DMF

Resource Reference Date (RSDATE)

DCAT

dcat:Dataset property dct:modified
Table 55. Resource Responsible Party
Specification Element

DDMS

ddms:pointOfContact

ID

53

I15 ebRIM

/wrs:ExtrinsicObject/rim:Classification[@ClassificationScheme="urn:ogc:def:ebRIM-ClassificationScheme:OGC-I15::CitedResponsibleParty"]

ISO

identificationInfo[1]//pointOfContact/

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:pointOfContact

NMF

identificationInfo[1]//pointOfContact/

DMF

Resource Responsible Party (RSRPTY)

DCAT

dcat:Dataset property dcat:contactPoint
Table 56. Resource Maintenance
Specification Element

DDMS

No appropriate mapping

ID

54

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//resourceMaintenance/

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resourceMaintenance/gmd:MD_MaintenanceInformation

NMF

identificationInfo[1]//resourceMaintenance/

DMF

Resource Maintenance (RSMTNC)

DCAT

No appropriate mapping
Table 57. Resource Security Constraint
Specification Element

DDMS

ddms:security

ID

55

I15 ebRIM

/rim:Association[@associationType="urn:ogc:def:ebRIM-AssociationType:OGC-I15::ResourceConstraints"]

ISO

identificationInfo[1]/*/resourceConstraints/MD_SecurityConstraints]

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resourceConstraints/gmd:MD_SecurityConstraints

NMF

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resourceConstraints/nas:MD_SecurityConstraints

DMF

Resource Security Constraint (RSSCST)

DCAT

dcat:Distribution property dct:rights
Table 58. Resource Releasability
Specification Element

DDMS

No appropriate mapping

ID

56

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]/*/resourceConstraints/NGMP_Constraints

ISO XPath

NGMP extension

NMF

No appropriate mapping

DMF

Resource Releasability (RSREL)

DCAT

dcat:Distribution property dct:rights
Table 59. Resource Use Limitation
Specification Element

DDMS

No appropriate mapping

ID

57

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]/*/resourceConstraints/MD_Constraints/useLimitation

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resourceConstraints/gmd:MD_Constraints/gmd:useLimitation

NMF

No appropriate mapping

DMF

Resource Use Limitation (RSUSE)

DCAT

dcat:Distribution property dct:license
Table 60. Resource Legal Constraint
Specification Element

DDMS

ddms:rights

ID

58

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::LegalConstraints"]

ISO

identificationInfo[1]/*/resourceConstraints/MD_LegalConstraints

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resourceConstraints/gmd:MD_LegalConstraints

NMF

identificationInfo[1]/*/resourceConstraints/MD_LegalConstraints

DMF

Resource Legal Constraint (RSLCST)

DCAT

dcat:Distribution property dct:rights
Table 61. Resource Lineage
Specification Element

DDMS

No appropriate mapping

ID

59

I15 ebRIM

/wrs:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:ebRIM-slot:OGC-I15::Lineage"]

ISO

dataQualityInfo//lineage//statement

ISO XPath

/gmd:MD_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:statement

NMF

dataQualityInfo//lineage//statement

DMF

Resource Lineage (RSLING)

DCAT

No appropriate mapping
Table 62. Resource Regulated Quality Report
Specification Element

DDMS

No appropriate mapping

ID

60

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::DataQuality"]

ISO

dataQualityInfo//report [ */measureIdentification and */result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueType=xs:string and */result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueUnit=unity] /

ISO XPath

/gmd:MD_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:report/gmd:*/

NMF

dataQualityInfo//report [ */measureIdentification and */result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueType=xs:string and */result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueUnit=unity] /

DMF

Resource Regulated Quality Report (RSRQR)

DCAT

No appropriate mapping
Table 63. Resource Unspecified Quality Report
Specification Element

DDMS

No appropriate mapping

ID

61

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::DataQuality"]

ISO

dataQualityInfo//report[not(/measureIdentification and /result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueType=xs:string and */result [ */valueType=xs:string and */valueUnit=unity] /DQ_QuantitativeResult/valueUnit=unity)]/

ISO XPath

/gmd:MD_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:report/gmd:*/

NMF

No appropriate mapping

DMF

Resource Unspecified Quality Report (RSUQR)

DCAT

No appropriate mapping
Table 64. Source of the Resource
Specification Element

DDMS

ddms:source

ID

62

I15 ebRIM

/wrs:ExtrinsicObject[@objectType="urn:ogc:def:ebRIM-ObjectType:OGC-I15::Lineage"]

ISO

dataQualityInfo//lineage//source/*

ISO XPath

/gmd:MD_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:source/gmd:LI_Source

NMF

dataQualityInfo//lineage//source/*

DMF

Source of the Resource (RSSRC)

DCAT

No appropriate mapping
Table 65. Resource Process Step
Specification Element

DDMS

No appropriate mapping

ID

63

I15 ebRIM

No appropriate mapping

ISO

dataQualityInfo//lineage//processStep/*

ISO XPath

/gmd:MD_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:processStep/gmd:LI_ProcessStep

NMF

dataQualityInfo//lineage//processStep/*

DMF

Resource Process Step (RSPRST)

DCAT

No appropriate mapping
Table 66. Resource Usage
Specification Element

DDMS

No appropriate mapping

ID

64

I15 ebRIM

No appropriate mapping

ISO

identificationInfo[1]//resourceSpecificUsage/

ISO XPath

/gmd:MD_Metadata/gmd:IdentificationInfo[n]/gmd:MD_Identification/gmd:resoruceSpecificUsage/gmd:MD_Usage

NMF

No appropriate mapping

DMF

Resource Usage (RSSPUS)

DCAT

No appropriate mapping
Table 67. Resource Distribution Format
Specification Element

DDMS

No appropriate mapping

ID

65

I15 ebRIM

No appropriate mapping

ISO

distributionInfo//distributionFormat/

ISO XPath

/gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributionFormat/gmd:MD_format

NMF

distributionInfo//distributionFormat/

DMF

Resource Distribution Format (RSDFMT)

DCAT

dcat:Distribution property dct:format
Table 68. Resource Online Location
Specification Element

DDMS

No appropriate mapping

ID

66

I15 ebRIM

No appropriate mapping

ISO

distributionInfo//transferOptions//onLine/*

ISO XPath

/gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:online/gmd:CI_OnlineResource

NMF

distributionInfo//transferOptions//onLine/*

DMF

Resource Online Location (RSONLLC)

DCAT

dcat:Distribution property dcat:downloadURL
Table 69. Resource Unit of Distribution
Specification Element

DDMS

No appropriate mapping

ID

67

I15 ebRIM

No appropriate mapping

ISO

distributionInfo//transferOptions//unitsOfDistribution[1]

ISO XPath

/gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:unitsOfDistribution

NMF

No appropriate mapping

DMF

Resource Unit of Distribution (RSUD)

DCAT

No appropriate mapping
Table 70. Resource Transfer Size
Specification Element

DDMS

No appropriate mapping

ID

68

I15 ebRIM

No appropriate mapping

ISO

distributionInfo//transferOptions//transferSize[1]

ISO XPath

/gmd:MD_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:transferSize

NMF

distributionInfo//transferOptions//transferSize[1]

DMF

Resource Transfer Size (RSTS)

DCAT

dcat:Distribution property dcat:byteSize

Appendix C: Sample Metadata

This appendix presents sample metadata in ISO 19139, NMIS, DMF, DDMS and DCAT.

C.1 Example ISO 19139 Listing

ISO19139 Sample
<gmd:MD_Metadata xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gts="http://www.isotc211.org/2005/gts" xmlns:srv="http://www.isotc211.org/2005/srv" xmlns:gml="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:geonet="http://www.fao.org/catalogue" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.isotc211.org/2005/gmd http://www.isotc211.org/2005/gmd/gmd.xsd http://www.isotc211.org/2005/gmx http://www.isotc211.org/2005/gmx/gmx.xsd http://www.isotc211.org/2005/srv http://schemas.opengis.net/iso/19139/20060504/service/srv.xsd">
  <gmd:fileIdentifier>
    <gco:CharacterString>3dc7f9b6-b573-445a-a8a3-a0ece544e8ce</gco:CharacterString>
  </gmd:fileIdentifier>
  <gmd:language>
    <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="eng" codeSpace="ISO639-2" />
  </gmd:language>
  <gmd:characterSet>
    <gmd:MD_CharacterSetCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#MD_CharacterSetCode" codeListValue="utf16" codeSpace="ISOTC211/19115" />
  </gmd:characterSet>
  <gmd:hierarchyLevel>
    <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset" codeSpace="ISOTC211/19115" />
  </gmd:hierarchyLevel>
  <gmd:contact>
    <gmd:CI_ResponsibleParty>
      <gmd:individualName gco:nilReason="missing">
        <gco:CharacterString />
      </gmd:individualName>
      <gmd:organisationName>
        <gco:CharacterString>Envitia</gco:CharacterString>
      </gmd:organisationName>
      <gmd:role>
        <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact" />
      </gmd:role>
    </gmd:CI_ResponsibleParty>
  </gmd:contact>
  <gmd:dateStamp>
    <gco:DateTime>2016-05-05T10:03:32</gco:DateTime>
  </gmd:dateStamp>
  <gmd:metadataStandardName>
    <gco:CharacterString>ISO19115</gco:CharacterString>
  </gmd:metadataStandardName>
  <gmd:metadataStandardVersion>
    <gco:CharacterString>2003/Cor.1:2006</gco:CharacterString>
  </gmd:metadataStandardVersion>
  <gmd:identificationInfo>
    <gmd:MD_DataIdentification>
      <gmd:citation>
        <gmd:CI_Citation>
          <gmd:title>
            <gco:CharacterString>Distribution of Arctic char species of complex Salvelinus alpinus around or within the polar regions</gco:CharacterString>
          </gmd:title>
          <gmd:date>
            <gmd:CI_Date>
              <gmd:date>
                <gco:Date>2016-01-01</gco:Date>
              </gmd:date>
              <gmd:dateType>
                <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication" />
              </gmd:dateType>
            </gmd:CI_Date>
          </gmd:date>
          <gmd:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>http://server/catalogue/3dc7f9b6-b573-445a-a8a3-a0ece544e8ce</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmd:identifier>
          <gmd:citedResponsibleParty>
            <gmd:CI_ResponsibleParty>
              <gmd:organisationName>
                <gco:CharacterString>Conservation of Arctic Flora and Fauna (CAFF)</gco:CharacterString>
              </gmd:organisationName>
              <gmd:role>
                <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact" />
              </gmd:role>
            </gmd:CI_ResponsibleParty>
          </gmd:citedResponsibleParty>
        </gmd:CI_Citation>
      </gmd:citation>
      <gmd:abstract>
        <gco:CharacterString>Circumpolar distribution of arctic char species complex Salvelinus alpinus, and related species.
-  &lt;a href="http://www.caff.is/assessment-series/10-arctic-biodiversity-assessment/211-arctic-biodiversity-assessment-2013-chapter-6-fishes" target="_blank"&gt; Arctic Biodiversity Assessment, Chapter 6: Fishes&lt;/a&gt;</gco:CharacterString>
      </gmd:abstract>
      <gmd:credit>
        <gco:CharacterString>Adapted from http://geo.abds.is/geonetwork/srv/eng/xml.metadata.get?id=497 for OGC Testbed 12 demonstration</gco:CharacterString>
      </gmd:credit>
      <gmd:status gco:nilReason="missing" />
      <gmd:resourceMaintenance>
        <gmd:MD_MaintenanceInformation>
          <gmd:maintenanceAndUpdateFrequency>
            <gmd:MD_MaintenanceFrequencyCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="irregular" codeSpace="ISOTC211/19115" />
          </gmd:maintenanceAndUpdateFrequency>
        </gmd:MD_MaintenanceInformation>
      </gmd:resourceMaintenance>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gco:CharacterString>Arctic Char</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>distribution</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>CAFF</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>ABA</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>Arctic Biodiversity Assessment</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>fishes</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>species</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>marine</gco:CharacterString>
          </gmd:keyword>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:language>
        <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="eng" codeSpace="ISO639-2" />
      </gmd:language>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>biota</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>oceans</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>inlandWaters</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:extent>
        <gmd:EX_Extent>
          <gmd:geographicElement>
            <gmd:EX_GeographicBoundingBox>
              <gmd:extentTypeCode>
                <gco:Boolean>true</gco:Boolean>
              </gmd:extentTypeCode>
              <gmd:westBoundLongitude>
                <gco:Decimal>-180</gco:Decimal>
              </gmd:westBoundLongitude>
              <gmd:eastBoundLongitude>
                <gco:Decimal>180</gco:Decimal>
              </gmd:eastBoundLongitude>
              <gmd:southBoundLatitude>
                <gco:Decimal>33.263444</gco:Decimal>
              </gmd:southBoundLatitude>
              <gmd:northBoundLatitude>
                <gco:Decimal>89</gco:Decimal>
              </gmd:northBoundLatitude>
            </gmd:EX_GeographicBoundingBox>
          </gmd:geographicElement>
        </gmd:EX_Extent>
      </gmd:extent>
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo xmlns:date="http://exslt.org/dates-and-times">
    <gmd:MD_Distribution>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://server/geoserver/Species/wms?</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>OGC:WMS</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Arctic_Char</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Circumpolar distribution of Arctic Char</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine />
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://arcticbiodiversity.is/abt2010/index.php/en/species/arctic-char</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>http-download</gco:CharacterString>
              </gmd:protocol>
              <gmd:name gco:nilReason="missing">
                <gco:CharacterString />
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Arctic Biodiversity Trends 2010: Selected indicators of change - Arctic Char</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://server/catalogue/service/eng/resources.get?3dc7f9b6-b573-445a-a8a3-a0ece544e8ce&amp;fname=Figure-6.3.jpg&amp;access=public</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>http-download</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gmx:MimeFileType xmlns:gmx="http://www.isotc211.org/2005/gmx" type="image/pjpeg">Figure-6.3.jpg</gmx:MimeFileType>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Figure 6.3 (PNG)</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://server/catalogue/service/eng/resources.get?3dc7f9b6-b573-445a-a8a3-a0ece544e8ce&amp;fname=Arctic_Char_2010.zip&amp;access=public</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>http-download</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gmx:MimeFileType xmlns:gmx="http://www.isotc211.org/2005/gmx" type="application/x-compressed">Arctic_Char_2010.zip</gmx:MimeFileType>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Download spatial data for Circumpolar distribution of Arctic Char</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded" codeSpace="ISOTC211/19115" />
      </gmd:maintenanceAndUpdateFrequency>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
</gmd:MD_Metadata>

C.2 Example NMF/NMIS Listing

NMF/NMIS Sample
<nas:MD_Metadata xmlns:srv="http://www.isotc211.org/2005/srv"  xmlns:nas="http://metadata.ces.mil/dse/ns/GSIP/5.0/nas" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ism="urn:us:gov:ic:ism" xmlns:ntk="urn:us:gov:ic:ntk" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://metadata.ces.mil/dse/ns/GSIP/5.0/nas ./nas/nmis.xsd" ism:DESVersion="9" ntk:DESVersion="7" ism:resourceElement="true" ism:createDate="2010-09-21" ism:classification="U" ism:ownerProducer="USA">
    <gmd:hierarchyLevel>
        <gmd:MD_ScopeCode codeList="http://api.nsgreg.nga.mil/codelist/ScopeCode" codeListValue="service"/>
    </gmd:hierarchyLevel>
    <gmd:hierarchyLevelName>
        <nas:ScopeAmplificationCode codeList="http://api.nsgreg.nga.mil/codelist/ScopeAmplificationCode" codeListValue="cell"/>
    </gmd:hierarchyLevelName>
    <gmd:contact>
        <gmd:CI_ResponsibleParty>
            <gmd:organisationName>
                <gco:CharacterString>Envitia</gco:CharacterString>
            </gmd:organisationName>
            <gmd:role>
                <gmd:CI_RoleCode codeList="http://api.nsgreg.nga.mil/codelist/RoleCode" codeListValue="publisher"/>
            </gmd:role>
        </gmd:CI_ResponsibleParty>
    </gmd:contact>
    <gmd:dateStamp>
        <gco:Date>2010-09-21</gco:Date>
    </gmd:dateStamp>
    <gmd:metadataStandardName>
        <nas:MetadataStandardNameCode codeList="http://api.nsgreg.nga.mil/codelist/MetadataStandardNameCode" codeListValue="nsgMetadataFoundation"/>
    </gmd:metadataStandardName>
    <gmd:metadataStandardVersion>
        <nas:MetadataStandardVersion>2.2.0</nas:MetadataStandardVersion>
    </gmd:metadataStandardVersion>
    <gmd:locale>
        <gmd:PT_Locale>
            <gmd:languageCode>
                <gmd:LanguageCode codeList="http://api.nsgreg.nga.mil/codelist/ISO639-2" codeListValue="eng"/>
            </gmd:languageCode>
            <gmd:country>
                <gmd:Country codeList="http://api.nsgreg.nga.mil/geo-political/GENC/3/2-1" codeListValue="USA"/>
            </gmd:country>
            <gmd:characterEncoding>
                <gmd:MD_CharacterSetCode codeList="http://api.nsgreg.nga.mil/codelist/CharacterSetCode" codeListValue="utf8"/>
            </gmd:characterEncoding>
        </gmd:PT_Locale>
    </gmd:locale>
    <gmd:referenceSystemInfo>
        <gmd:MD_ReferenceSystem>
            <gmd:referenceSystemIdentifier>
                <gmd:RS_Identifier>
                    <gmd:code>
                        <gco:CharacterString>WGS84E_2D</gco:CharacterString>
                    </gmd:code>
                    <gmd:codeSpace>
						<gco:CharacterString>http://api.nsgreg.nga.mil/coord-ref-system</gco:CharacterString>
                    </gmd:codeSpace>
                </gmd:RS_Identifier>
            </gmd:referenceSystemIdentifier>
        </gmd:MD_ReferenceSystem>
    </gmd:referenceSystemInfo>
    <gmd:identificationInfo>
        <nas:MD_DataIdentification>
            <gmd:citation>
                <gmd:CI_Citation>
                    <gmd:title>
                        <gco:CharacterString>Ecological Restoration of Abandoned Oil Field Facilities and Exploration Well Sites in North Slope, Alaska</gco:CharacterString>
                    </gmd:title>
                    <gmd:date>
                        <gmd:CI_Date>
                            <gmd:date>
                                <gco:Date>2016-04-30</gco:Date>
                            </gmd:date>
                            <gmd:dateType>
                                <gmd:CI_DateTypeCode codeList="http://api.nsgreg.nga.mil/codelist/DateTypeCode" codeListValue="distribution"/>
                            </gmd:dateType>
                        </gmd:CI_Date>
                    </gmd:date>
                </gmd:CI_Citation>
            </gmd:citation>
            <gmd:abstract>
                <gco:CharacterString>The program involves developing revegetation performance standards; providing recommendations for enhancing the wildlife characteristics of rehabilitated areas; identifying and applying appropriate plant materials; monitoring soil and vegetation response; and monitoring the surface and thermal stability of rehabilitated sites.</gco:CharacterString>
            </gmd:abstract>
            <gmd:pointOfContact>
			<gmd:CI_ResponsibleParty>
				<gmd:organisationName>
					<gco:CharacterString></gco:CharacterString>
				</gmd:organisationName>
				<gmd:role>
					<gmd:CI_RoleCode codeList="http://api.nsgreg.nga.mil/codelist/RoleCode" codeListValue="originator"/>
				</gmd:role>
			</gmd:CI_ResponsibleParty>
            </gmd:pointOfContact>
            <gmd:descriptiveKeywords>
                <gmd:MD_Keywords>
                    <gmd:keyword>
                        <gco:CharacterString>environmental information</gco:CharacterString>
                    </gmd:keyword>
                    <gmd:type>
                        <gmd:MD_KeywordTypeCode codeList="http://api.nsgreg.nga.mil/codelist/KeywordTypeCode" codeListValue="theme"/>
                    </gmd:type>
                    <gmd:thesaurusName>
                        <gmd:CI_Citation>
                            <gmd:title>
                                <gco:CharacterString>GEMET Thesaurus</gco:CharacterString>
                            </gmd:title>
                            <gmd:date>
                                <gmd:CI_Date>
                                    <gmd:date>
                                        <gco:Date>2016-04-30</gco:Date>
                                    </gmd:date>
                                    <gmd:dateType>
                                        <gmd:CI_DateTypeCode codeList="http://api.nsgreg.nga.mil/codelist/DateTypeCode" codeListValue="publication"/>
                                    </gmd:dateType>
                                </gmd:CI_Date>
                            </gmd:date>
                        </gmd:CI_Citation>
                    </gmd:thesaurusName>
                </gmd:MD_Keywords>
            </gmd:descriptiveKeywords>
            <gmd:resourceConstraints>
                <nas:MD_SecurityConstraints>
                    <gmd:classification>
                        <gmd:MD_ClassificationCode codeList="http://api.nsgreg.nga.mil/codelist/ClassificationCode" codeListValue="unclassified"/>
                    </gmd:classification>
                    <gmd:classificationSystem>
                        <nas:ClassificationSystem>US CAPCO</nas:ClassificationSystem>
                    </gmd:classificationSystem>
                    <nas:capcoMarking ism:classification="U" ism:ownerProducer="USA"/>
                </nas:MD_SecurityConstraints>
            </gmd:resourceConstraints>
            <gmd:language>
                <gmd:LanguageCode codeList="http://api.nsgreg.nga.mil/codelist/ISO639-2" codeListValue="eng"/>
            </gmd:language>
            <gmd:characterSet>
                <gmd:MD_CharacterSetCode codeList="http://api.nsgreg.nga.mil/codelist/CharacterSetCode" codeListValue="utf8"/>
            </gmd:characterSet>
            <gmd:topicCategory>
                <gmd:MD_TopicCategoryCode>intelligenceMilitary</gmd:MD_TopicCategoryCode>
            </gmd:topicCategory>
			<gmd:extent>
				<gmd:EX_Extent>
					<gmd:geographicElement>
						<gmd:EX_GeographicBoundingBox>
							<gmd:westBoundLongitude>
								<gco:Decimal>-166.75</gco:Decimal>
							</gmd:westBoundLongitude>
							<gmd:eastBoundLongitude>
								<gco:Decimal>-141</gco:Decimal>
							</gmd:eastBoundLongitude>
							<gmd:southBoundLatitude>
								<gco:Decimal>67</gco:Decimal>
							</gmd:southBoundLatitude>
							<gmd:northBoundLatitude>
								<gco:Decimal>71.25</gco:Decimal>
							</gmd:northBoundLatitude>
						</gmd:EX_GeographicBoundingBox>
					</gmd:geographicElement>
				</gmd:EX_Extent>
			</gmd:extent>
            <nas:languageCountry>
                <nas:LanguageCountryCode codeList="http://api.nsgreg.nga.mil/geo-political/GENC/3/2-1" codeListValue="USA"/>
            </nas:languageCountry>
            <nas:resourceCategory>
                <nas:ResourceCategoryCode codeList="http://api.nsgreg.nga.mil/codelist/ResourceCategoryCode" codeListValue="topographicFeatures"/>
            </nas:resourceCategory>
        </nas:MD_DataIdentification>
    </gmd:identificationInfo>
    <gmd:metadataConstraints>
        <nas:MD_SecurityConstraints>
            <gmd:classification>
                <gmd:MD_ClassificationCode codeList="http://api.nsgreg.nga.mil/codelist/ClassificationCode" codeListValue="unclassified"/>
            </gmd:classification>
            <gmd:classificationSystem>
                <nas:ClassificationSystem>US CAPCO</nas:ClassificationSystem>
            </gmd:classificationSystem>
            <nas:capcoMarking ism:classification="U" ism:ownerProducer="USA"/>
            <nas:needToKnow>
                <ntk:Access ism:classification="U" ism:ownerProducer="USA">
                    <ntk:AccessGroupList>
                        <ntk:AccessGroup ism:classification="U" ism:ownerProducer="USA">
                            <ntk:AccessSystemName ism:classification="U" ism:ownerProducer="USA">NSG</ntk:AccessSystemName>
                            <ntk:AccessGroupValue ism:classification="U" ism:ownerProducer="USA">User</ntk:AccessGroupValue>
                        </ntk:AccessGroup>
                    </ntk:AccessGroupList>
                </ntk:Access>
            </nas:needToKnow>
        </nas:MD_SecurityConstraints>
    </gmd:metadataConstraints>
</nas:MD_Metadata>

C.3 Example DMF Listing

DMF Sample
<gmd:MD_Metadata xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:ngmp="urn:int:nato:geometoc:geo:metadata:ngmp:1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gml="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.isotc211.org/2005/gmd http://127.0.0.1:9080/examples/dgiwg/xmlns/dmf/1.0/iso-g1/profile/all/all.xsd" uuid="OGC_TB12_MAP0" id="MAP0">
	<gmd:fileIdentifier>
		<gco:CharacterString>1470659450170</gco:CharacterString>
	</gmd:fileIdentifier>
	<gmd:language>
		<gco:CharacterString>eng</gco:CharacterString>
	</gmd:language>
	<gmd:hierarchyLevel>
		<gmd:MD_ScopeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode" codeListValue="dataset"/>
	</gmd:hierarchyLevel>
	<gmd:contact>
		<gmd:CI_ResponsibleParty>
			<gmd:organisationName>
				<gco:CharacterString>Envitia</gco:CharacterString>
			</gmd:organisationName>
			<gmd:role>
				<gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#CI_RoleCode" codeListValue="publisher"/>
			</gmd:role>
		</gmd:CI_ResponsibleParty>
	</gmd:contact>
	<!-- Date the metadata was created -->
	<gmd:dateStamp>
		<gco:Date>2016-05-08</gco:Date>
	</gmd:dateStamp>
	<!-- IDENTIFICATION INFORMATION -->
	<gmd:identificationInfo>
		<gmd:MD_DataIdentification>
			<gmd:citation>
				<gmd:CI_Citation>
					<gmd:title>
						<gco:CharacterString>Ecological Restoration of Abandoned Oil Field Facilities and Exploration Well Sites in North Slope, Alaska</gco:CharacterString>
					</gmd:title>
					<gmd:date>
						<gmd:CI_Date>
							<gmd:date>
								<gco:Date>2016-03-03</gco:Date>
							</gmd:date>
							<gmd:dateType>
								<gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#CI_DateTypeCode" codeListValue="revision"/>
							</gmd:dateType>
						</gmd:CI_Date>
					</gmd:date>
				</gmd:CI_Citation>
			</gmd:citation>
			<gmd:abstract>
				<gco:CharacterString>The program involves developing revegetation performance standards; providing recommendations for enhancing the wildlife characteristics of rehabilitated areas; identifying and applying appropriate plant materials; monitoring soil and vegetation response; and monitoring the surface and thermal stability of rehabilitated sites.</gco:CharacterString>
			</gmd:abstract>
			<gmd:pointOfContact>
				<gmd:CI_ResponsibleParty>
					<gmd:organisationName>
						<gco:CharacterString></gco:CharacterString>
					</gmd:organisationName>
					<gmd:role>
						<gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#CI_RoleCode" codeListValue="originator"/>
					</gmd:role>
				</gmd:CI_ResponsibleParty>
			</gmd:pointOfContact>
			<gmd:descriptiveKeywords>
				<gmd:MD_Keywords>
					<gmd:keyword>
						<gco:CharacterString>imageCoverage</gco:CharacterString>
					</gmd:keyword>
					<gmd:type>
						<gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_KeywordTypeCode" codeListValue="discipline"/>
					</gmd:type>
					<gmd:thesaurusName>
						<gmd:CI_Citation>
							<gmd:title>
								<gco:CharacterString>NGMP_GeospatialInformationTypeCode</gco:CharacterString>
							</gmd:title>
							<gmd:date/>
						</gmd:CI_Citation>
					</gmd:thesaurusName>
				</gmd:MD_Keywords>
			</gmd:descriptiveKeywords>
			<gmd:descriptiveKeywords>
				<gmd:MD_Keywords>
					<gmd:keyword>
						<gco:CharacterString>georeferenced</gco:CharacterString>
					</gmd:keyword>
					<gmd:type>
						<gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_KeywordTypeCode" codeListValue="discipline"/>
					</gmd:type>
					<gmd:thesaurusName>
						<gmd:CI_Citation>
							<gmd:title>
								<gco:CharacterString>NGMP_GeoreferencingLevelCode</gco:CharacterString>
							</gmd:title>
							<gmd:date/>
						</gmd:CI_Citation>
					</gmd:thesaurusName>
				</gmd:MD_Keywords>
			</gmd:descriptiveKeywords>
			<gmd:descriptiveKeywords>
				<gmd:MD_Keywords>
					<gmd:keyword>
						<gco:CharacterString>digital</gco:CharacterString>
					</gmd:keyword>
					<gmd:type>
						<gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_KeywordTypeCode" codeListValue="theme"/>
					</gmd:type>
					<gmd:thesaurusName>
						<gmd:CI_Citation>
							<gmd:title>
								<gco:CharacterString>NGMP_RepresentationFormCode</gco:CharacterString>
							</gmd:title>
							<gmd:date/>
						</gmd:CI_Citation>
					</gmd:thesaurusName>
				</gmd:MD_Keywords>
			</gmd:descriptiveKeywords>
			<gmd:descriptiveKeywords>
				<gmd:MD_Keywords>
					<gmd:keyword>
						<gco:CharacterString>L0</gco:CharacterString>
					</gmd:keyword>
					<gmd:type>
						<gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_KeywordTypeCode" codeListValue="theme"/>
					</gmd:type>
					<gmd:thesaurusName>
						<gmd:CI_Citation>
							<gmd:title>
								<gco:CharacterString>NGMP_DataLevelCode</gco:CharacterString>
							</gmd:title>
							<gmd:date/>
						</gmd:CI_Citation>
					</gmd:thesaurusName>
				</gmd:MD_Keywords>
			</gmd:descriptiveKeywords>
			<gmd:descriptiveKeywords>
				<gmd:MD_Keywords>
					<gmd:keyword>
						<gco:CharacterString>OperationsEvents</gco:CharacterString>
					</gmd:keyword>
					<gmd:type>
						<gmd:MD_KeywordTypeCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_KeywordTypeCode" codeListValue="theme"/>
					</gmd:type>
					<gmd:thesaurusName>
						<gmd:CI_Citation>
							<gmd:title>
								<gco:CharacterString>NGMP_ThematicCode</gco:CharacterString>
							</gmd:title>
							<gmd:date/>
						</gmd:CI_Citation>
					</gmd:thesaurusName>
				</gmd:MD_Keywords>
			</gmd:descriptiveKeywords>
			<gmd:resourceConstraints>
				<gmd:MD_SecurityConstraints>
					<gmd:classification>
						<gmd:MD_ClassificationCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_ClassificationCode" codeListValue="unclassified"/>
					</gmd:classification>
				</gmd:MD_SecurityConstraints>
			</gmd:resourceConstraints>
			<gmd:resourceConstraints>
				<ngmp:NGMP_Constraints>
					<ngmp:releasibility>
						<ngmp:NGMP_Releasibility>
							<ngmp:addressee>
								<gmd:CI_ResponsibleParty>
									<gmd:organisationName>
										<gco:CharacterString>OGC Testbed 12</gco:CharacterString>
									</gmd:organisationName>
									<gmd:role>
										<gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#CI_RoleCode" codeListValue="user"/>
									</gmd:role>
								</gmd:CI_ResponsibleParty>
							</ngmp:addressee>
						</ngmp:NGMP_Releasibility>
					</ngmp:releasibility>
				</ngmp:NGMP_Constraints>
			</gmd:resourceConstraints>
			<gmd:language>
				<gco:CharacterString>eng</gco:CharacterString>
			</gmd:language>
			<gmd:topicCategory>
				<gmd:MD_TopicCategoryCode>environment</gmd:MD_TopicCategoryCode>
			</gmd:topicCategory>
			<gmd:extent>
				<gmd:EX_Extent>
					<gmd:geographicElement>
						<gmd:EX_GeographicBoundingBox>
							<gmd:westBoundLongitude>
								<gco:Decimal>-166.75</gco:Decimal>
							</gmd:westBoundLongitude>
							<gmd:eastBoundLongitude>
								<gco:Decimal>-141</gco:Decimal>
							</gmd:eastBoundLongitude>
							<gmd:southBoundLatitude>
								<gco:Decimal>67</gco:Decimal>
							</gmd:southBoundLatitude>
							<gmd:northBoundLatitude>
								<gco:Decimal>71.25</gco:Decimal>
							</gmd:northBoundLatitude>
						</gmd:EX_GeographicBoundingBox>
					</gmd:geographicElement>
				</gmd:EX_Extent>
			</gmd:extent>
		</gmd:MD_DataIdentification>
	</gmd:identificationInfo>
	<gmd:metadataConstraints>
				<gmd:MD_SecurityConstraints>
					<gmd:classification>
						<gmd:MD_ClassificationCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_ClassificationCode" codeListValue="unclassified"/>
					</gmd:classification>
				</gmd:MD_SecurityConstraints>
	</gmd:metadataConstraints>
	<gmd:metadataConstraints>
				<ngmp:NGMP_Constraints>
					<ngmp:releasibility>
						<ngmp:NGMP_Releasibility>
							<ngmp:addressee>
								<gmd:CI_ResponsibleParty>
									<gmd:organisationName>
										<gco:CharacterString>OGC Testbed 12</gco:CharacterString>
									</gmd:organisationName>
									<gmd:role>
										<gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/codeList.xml#CI_RoleCode" codeListValue="user"/>
									</gmd:role>
								</gmd:CI_ResponsibleParty>
							</ngmp:addressee>
						</ngmp:NGMP_Releasibility>
					</ngmp:releasibility>
				</ngmp:NGMP_Constraints>
	</gmd:metadataConstraints>
</gmd:MD_Metadata>

C.4 Example DDMS Listing

DDMS Sample
<ddms:Resource xmlns:ddms="http://metadata.dod.mil/mdr/ns/DDMS/2.0/">
   <ddms:identifier ddms:qualifier="OGC Testbed 12"
                    ddms:value="DZB1216-500499L001001"/>
   <ddms:title xmlns:ICISM="urn:us:gov:ic:ism:v2" ICISM:classification="U"
               ICISM:ownerProducer="USA">Ecological Restoration of Abandoned Oil Field Facilities and Exploration Well Sites in North Slope, Alaska</ddms:title>
   <ddms:description xmlns:ICISM="urn:us:gov:ic:ism:v2" ICISM:classification="U"
                     ICISM:ownerProducer="USA">The program involves developing revegetation performance standards; providing recommendations for enhancing the wildlife characteristics of rehabilitated areas; identifying and applying appropriate plant materials; monitoring soil and vegetation response; and monitoring the surface and thermal stability of rehabilitated sites.</ddms:description>
   <ddms:dates ddms:created="2016-03-03" ddms:posted="2016-03-03"/>
   <ddms:rights ddms:privacyAct="true" ddms:intellectualProperty="true"/>
   <ddms:source ddms:qualifier="" ddms:value=""/>
   <ddms:type ddms:qualifier="http://api.nsgreg.nga.mil/codelist/ScopeCode"
              ddms:value="dataset"/>
   <ddms:creator>
      <ddms:Organization>
         <ddms:name></ddms:name>
      </ddms:Organization>
   </ddms:creator>
   <ddms:format>
      <ddms:Media>
         <ddms:mimeType/>
         <ddms:extent ddms:qualifier="sizeBytes" ddms:value="NaN"/>
         <ddms:medium/>
      </ddms:Media>
   </ddms:format>
   <ddms:subjectCoverage>
      <ddms:Subject>
         <ddms:category ddms:qualifier="GCMD Location Keywords" ddms:code="GLOBAL" ddms:label="GLOBAL"/>
      </ddms:Subject>
   </ddms:subjectCoverage>
   <ddms:temporalCoverage>
      <ddms:TimePeriod>
         <ddms:start>2016-03-03</ddms:start>
         <ddms:end>2016-03-03</ddms:end>
      </ddms:TimePeriod>
   </ddms:temporalCoverage>
   <ddms:geospatialCoverage>
      <ddms:GeospatialExtent>
         <ddms:geographicIdentifier>
            <ddms:name>GLOBAL</ddms:name>
         </ddms:geographicIdentifier>
         <ddms:boundingBox>
            <ddms:WestBL>-166.75</ddms:WestBL>
            <ddms:EastBL>-141</ddms:EastBL>
            <ddms:SouthBL>67</ddms:SouthBL>
            <ddms:NorthBL>71.25</ddms:NorthBL>
         </ddms:boundingBox>
         <ddms:boundingGeometry xmlns:gml="http://www.opengis.net/gml">
            <gml:Polygon gml:id="ResourceExtentPolygon"
                         srsName="http://api.nsgreg.nga.mil/coord-ref-system/WGS84E_2D">
               <gml:exterior>
                  <gml:LinearRing>
                     <gml:pos>71.25 -141</gml:pos>
                     <gml:pos>71.25 -166.75</gml:pos>
                     <gml:pos>67 -166.75</gml:pos>
                     <gml:pos>67 -141</gml:pos>
                  </gml:LinearRing>
               </gml:exterior>
            </gml:Polygon>
         </ddms:boundingGeometry>
         <ddms:verticalExtent ddms:unitOfMeasure="Foot" ddms:datum="MSL">
            <ddms:MinVerticalExtent>0.0</ddms:MinVerticalExtent>
            <ddms:MaxVerticalExtent>100.0</ddms:MaxVerticalExtent>
         </ddms:verticalExtent>
      </ddms:GeospatialExtent>
   </ddms:geospatialCoverage>
   <ddms:relatedResources ddms:relationship="aggregation">
      <ddms:RelatedResource ddms:qualifier="Envitia GeoRegistry"
                            ddms:value="urn:uuid:e9129b4b-ea21-4531-9a1c-471565521c21">
         <ddms:link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.envitia.com"
                    xlink:title="Envitia GeoRegistry for OGC Testbed 12"/>
      </ddms:RelatedResource>
   </ddms:relatedResources>
   <ddms:security xmlns:ICISM="urn:us:gov:ic:ism:v2" ICISM:classification="U"
                  ICISM:ownerProducer="USA"/>
</ddms:Resource>

C.5 Example DCAT Listing in RDF/XML

DCAT Sample
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:adms="http://www.w3.org/ns/adms#" xmlns:cnt="http://www.w3.org/2011/content#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcat="http://www.w3.org/ns/dcat#" xmlns:dct="http://purl.org/dc/terms/" xmlns:dctype="http://purl.org/dc/dcmitype/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:gsp="http://www.opengis.net/ont/geosparql#" xmlns:locn="http://www.w3.org/ns/locn#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:org="http://www.w3.org/ns/org#" xmlns:prov="http://www.w3.org/ns/prov#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:schema="http://schema.org/" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:vcard="http://www.w3.org/2006/vcard/ns#">
  <rdf:Description>
    <foaf:isPrimaryTopicOf>
      <rdf:Description>
        <rdf:type rdf:resource="http://www.w3.org/ns/dcat#CatalogRecord"/>
        <dct:language rdf:resource="http://publications.europa.eu/resource/authority/language/ENG"/>
        <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2016-05-08</dct:modified>
        <dct:publisher>
          <rdf:Description>
            <rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Organization"/>
          </rdf:Description>
        </dct:publisher>
        <prov:qualifiedAttribution>
          <prov:Attribution>
            <prov:agent>
              <rdf:Description>
                <rdf:type rdf:resource="http://www.w3.org/2006/vcard/ns#Organization"/>
                <vcard:fn xml:lang="en">Envitia</vcard:fn>
              </rdf:Description>
            </prov:agent>
            <dct:type rdf:resource="http://inspire.ec.europa.eu/metadata-codelist/ResponsiblePartyRole/publisher"/>
          </prov:Attribution>
        </prov:qualifiedAttribution>
        <dct:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#string">1470659450170</dct:identifier>
      </rdf:Description>
    </foaf:isPrimaryTopicOf>
    <rdf:type rdf:resource="http://www.w3.org/ns/dcat#Dataset"/>
    <dct:type rdf:resource="http://inspire.ec.europa.eu/metadata-codelist/ResourceType/dataset"/>
    <dct:title xml:lang="en">Ecological Restoration of Abandoned Oil Field Facilities and Exploration Well Sites in North Slope, Alaska</dct:title>
    <dct:description xml:lang="en">The program involves developing revegetation performance standards; providing recommendations for enhancing the wildlife characteristics of rehabilitated areas; identifying and applying appropriate plant materials; monitoring soil and vegetation response; and monitoring the surface and thermal stability of rehabilitated sites.</dct:description>
    <dct:subject rdf:resource="http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/environment"/>
    <dcat:theme rdf:parseType="Resource">
      <skos:prefLabel xml:lang="en">imageCoverage</skos:prefLabel>
      <skos:inScheme>
        <skos:ConceptScheme>
          <dct:title xml:lang="en">NGMP_GeospatialInformationTypeCode</dct:title>
        </skos:ConceptScheme>
      </skos:inScheme>
    </dcat:theme>
    <dcat:theme rdf:parseType="Resource">
      <skos:prefLabel xml:lang="en">georeferenced</skos:prefLabel>
      <skos:inScheme>
        <skos:ConceptScheme>
          <dct:title xml:lang="en">NGMP_GeoreferencingLevelCode</dct:title>
        </skos:ConceptScheme>
      </skos:inScheme>
    </dcat:theme>
    <dcat:theme rdf:parseType="Resource">
      <skos:prefLabel xml:lang="en">digital</skos:prefLabel>
      <skos:inScheme>
        <skos:ConceptScheme>
          <dct:title xml:lang="en">NGMP_RepresentationFormCode</dct:title>
        </skos:ConceptScheme>
      </skos:inScheme>
    </dcat:theme>
    <dcat:theme rdf:parseType="Resource">
      <skos:prefLabel xml:lang="en">L0</skos:prefLabel>
      <skos:inScheme>
        <skos:ConceptScheme>
          <dct:title xml:lang="en">NGMP_DataLevelCode</dct:title>
        </skos:ConceptScheme>
      </skos:inScheme>
    </dcat:theme>
    <dcat:theme rdf:parseType="Resource">
      <skos:prefLabel xml:lang="en">OperationsEvents</skos:prefLabel>
      <skos:inScheme>
        <skos:ConceptScheme>
          <dct:title xml:lang="en">NGMP_ThematicCode</dct:title>
        </skos:ConceptScheme>
      </skos:inScheme>
    </dcat:theme>
    <dct:language rdf:resource="http://publications.europa.eu/resource/authority/language/ENG"/>
    <dct:spatial rdf:parseType="Resource">
      <locn:geometry rdf:datatype="http://www.opengis.net/ont/geosparql#wktLiteral"><![CDATA[POLYGON((-166.75 71.25,-141 71.25,-141 67,-166.75 67,-166.75 71.25))]]></locn:geometry>
      <locn:geometry rdf:datatype="http://www.opengis.net/ont/geosparql#gmlLiteral"><![CDATA[<gml:Envelope srsName="http://www.opengis.net/def/crs/OGC/1.3/CRS84"><gml:lowerCorner>-166.75 67</gml:lowerCorner><gml:upperCorner>-141 71.25</gml:upperCorner></gml:Envelope>]]></locn:geometry>
      <locn:geometry rdf:datatype="https://www.iana.org/assignments/media-types/application/vnd.geo+json"><![CDATA[{"type":"Polygon","crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:OGC:1.3:CRS84"}},"coordinates":[[[-166.75,71.25],[-141,71.25],[-141,67],[-166.75,67],[-166.75,71.25]]]}]]></locn:geometry>
    </dct:spatial>
    <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2016-03-03</dct:modified>
    <prov:qualifiedAttribution>
      <prov:Attribution>
        <prov:agent>
          <rdf:Description>
            <rdf:type rdf:resource="http://www.w3.org/2006/vcard/ns#Organization"/>
            <vcard:fn xml:lang="en"></vcard:fn>
          </rdf:Description>
        </prov:agent>
        <dct:type rdf:resource="http://inspire.ec.europa.eu/metadata-codelist/ResponsiblePartyRole/originator"/>
      </prov:Attribution>
    </prov:qualifiedAttribution>
  </rdf:Description>
</rdf:RDF>

C.6 Example DCAT Listing in RDF Turtle

RDF Turtle Sample
@prefix dc:    <http://purl.org/dc/elements/1.1/> .
@prefix dcat:  <http://www.w3.org/ns/dcat#> .
@prefix foaf:  <http://xmlns.com/foaf/0.1/> .
@prefix dct:   <http://purl.org/dc/terms/> .
@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
<http://example.com/data/G1470659298021>  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>  <http://www.w3.org/ns/dcat#Dataset>.
<http://example.com/data/G1470659298021>  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>  <http://www.opengis.net/ont/testbed12/srim#Item>.
<http://example.com/data/G1470659298021>  <http://purl.org/dc/terms/description>    "This Web Feature Service is established for the testing of OGC Testbed-12 WFS SOAP server project." .
<http://example.com/data/G1470659298021>  <http://purl.org/dc/terms/identifier>     "urn:x-envitia:TB12:NMF:nmf-G1470659298021" .
<http://example.com/data/G1470659298021>  <http://purl.org/dc/terms/title>          "My GeoServer WFS" .
<http://example.com/data/G1470659298021>  <http://purl.org/dc/terms/spatial>        [ <http://www.w3.org/ns/locn#geometry>  "<gml:Envelope xmlns:gml=\"http://www.opengis.net/gml\" srsName=\"http://www.opengis.net/def/crs/OGC/1.3/CRS84\"><gml:lowerCorner>37.709678335119676 -122.50391472739219</gml:lowerCorner><gml:upperCorner>37.82624490757897 -122.36699051452052</gml:upperCorner></gml:Envelope>"^^<http://www.opengis.net/ont/geosparql#gmlLiteral> ] .
<http://example.com/data/G1470659298021>  <http://purl.org/dc/terms/distribution>  [ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>                 <http://www.w3.org/ns/dcat#Distribution> ;
                         <http://purl.org/dc/terms/title>         "NMF metadata for urn:x-envitia:TB12:NMF:nmf-G1470659298021" ;
                         <http://www.w3.org/ns/dcat#downloadURL>  "http://myserver.com/RegistryService/registry?service=CSW&request=GetRepositoryItem&version=2.0.2&id=urn:x-envitia:TB12:NMF:nmf-G1470659298021:DS"
                       ] ;
    <http://www.w3.org/ns/dcat#distribution>  [ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>                 <http://www.w3.org/ns/dcat#Distribution> ;
                         <http://purl.org/dc/terms/title>         "DGIWG metadata for urn:x-envitia:TB12:NMF:nmf-G1470659298021" ;
                         <http://www.w3.org/ns/dcat#downloadURL>  "http://myserver.com/RegistryService/registry?service=CSW&request=GetRepositoryItem&version=2.0.2&id=urn:x-envitia:TB12:DGIWG:dgiwg-G1470659298021:DS"
                       ] ;
    <http://www.w3.org/ns/dcat#distribution>  [ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>                 <http://www.w3.org/ns/dcat#Distribution> ;
                         <http://purl.org/dc/terms/title>         "DDMS metadata for urn:x-envitia:TB12:NMF:nmf-G1470659298021" ;
                         <http://www.w3.org/ns/dcat#downloadURL>  "http://myserver.com/RegistryService/registry?service=CSW&request=GetRepositoryItem&version=2.0.2&id=urn:x-envitia:TB12:DDMS:ddms-G1470659298021:DS"
                       ] ;
    <http://www.w3.org/ns/dcat#distribution>  [ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>                 <http://www.w3.org/ns/dcat#Distribution> ;
                         <http://purl.org/dc/terms/title>         "DCAT metadata for urn:x-envitia:TB12:NMF:nmf-G1470659298021" ;
                         <http://www.w3.org/ns/dcat#downloadURL>  "http://myserver.com/RegistryService/registry?service=CSW&request=GetRepositoryItem&version=2.0.2&id=urn:x-envitia:TB12:DCAT:dcat-G1470659298021:DS"
                       ] ;
    <http://www.w3.org/ns/dcat#keyword>       "testbed" , "OGC".

Appendix D: Change Requests

CR 397: DCAT/GeoSPARQL service endpoint for CSW

This section presents a series of Change Requests resulting from the Testbed-12 activities reported in this document.

CSW services should be enabled to offer a GeoSPARQL service endpoint that publishes metadata in W3C DCAT standard (using OGC GeoSPARQL for location attributes as demonstrated by GeoDCAT) and can receive federated SPARQL queries from other SPARQL services. This change request is a recommendation from OGC Testbed 12 and discussed in the "OGC Testbed 12 Catalogue and SPARQL Engineering Report".

The justification for this change request is the need to provide an encoding that all profiles of CSW can support and use to make inferences about metadata from different catalogues. Other benefits demonstrated by Testbed-12: Improved ability to search multiple heterogeneous catalogues; Reduction in the time it takes to discover resources from multiple catalogues; Improved ability to determine associations between metadata encoded in different specifications; and Greater interoperability with the W3C and Linked Data community.

This change request also applies to OGC 12-168r8.

Testbed-12 found that the metadata returned by catalogues implemented by the wider OGC membership ranged from ISO 19139 XML, NMIS(XML encoding of NGA profile of ISO 19115), DDMS, ebRIM ExtrinsicObjects based on OGC I15 profile of CSW-ebRIM etc. There is therefore a need to allow catalogues to return the metadata in a common language. The use of W3C DCAT with OGC GeoSPARQL offers that solution. Note that use of DCAT would also enable federated search across different CSW versions and profiles.

The change request can be found at the following location:

http://ogc.standardstracker.org/show_request.cgi?id=397

CR 398: Adapt profiles of CSW 2.0.2 to CSW 3.0

OGC Testbed 12 found that, since CSW 3.0 is relatively new, many of the profiles that made CSW 2.0.2 a success have not yet been adapted for CSW 3.0. The testbed recommended that OGC adapts profiles of CSW 2.0.2 to CSW 3.0. For example: (1) FGDC CSDGM Application Profile for CSW 2.0 ; (2) OGC® Catalogue Services Standard 2.0 Extension Package for ebRIM Application Profile: Earth Observation Products; and (3) OGC I15 (ISO19115 Metadata) Extension Package of CS-W ebRIM Profile 1.0. This change request is a recommendation from OGC Testbed 12 and discussed in the "OGC Testbed 12 Catalogue and SPARQL Engineering Report".

The change request can be found at the following location:

http://ogc.standardstracker.org/show_request.cgi?id=398

CR 399: Duplicated Annex headings and broken links in Catalogue 3.0

Testbed 12 found the following problems on both the HTML and PDF versions of OGC 12-168r6 Catalogue Service Version 3.0.

Problem 1: Both Annex A and Annex B have the same title "BNF Definition of OGC CommonQL (Normative)". However, Annex A appears to describe Federation and not the OGC CommonQL language. This must be a copy-and-paste error. The title of Annex A should be corrected.

Problem 2: The table of contents of the HTML version does not include Annex B.

The following problem was found only in the PDF version.

Problem 3: There are at least five instanced of "Error! Reference source not found" or "Error! Bookmark not defined". References should be updated and the PDF regenerated.

Problem 4: The last paragraph of section 6.3.1 says "Service metadata elements should be consistent with ISO 19119 or 19115:2014". This should be updated to say ISO 19115-1:2014. That is, append "dash minus one".

The problems were reported in the "OGC Testbed 12 Catalogue and SPARQL Engineering Report".

http://ogc.standardstracker.org/show_request.cgi?id=399

CR 400: The Catalogue Service 3.0 standard uses a CSW 2.0.2 GetRecords example

Testbed 12 found the following problem on the PDF and HTML version of OGC 12-168r6 Catalogue 3.0.

The same GetRecords request in section 6.3.3 is for CSW 2.0.2. The version attribute in the GetRecords element is version="2.0.2". This should be updated to version="3.0.0"

The problem was reported in the "OGC Testbed 12 Catalogue and SPARQL Engineering Report".

http://ogc.standardstracker.org/show_request.cgi?id=400

Appendix E: Revision History

Table 71. Revision History
Date Release Editor Primary clauses modified Descriptions

September 30, 2016

G. Hobona

1.1

various

first complete draft

October 31, 2016

G. Hobona

1.2

various

final complete draft. Addresses comments from OGC IP team.