Document contributor contact points Future work

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1.4 Forward

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. OGC 06-121r3, OGC ® Web Services Common Standard NOTE This OWS Common Standard contains a list of normative references that are also applicable to this Implementation Standard. OGC 07-006r1, OGC ® Catalog Services Implementation Specification v2.0.2. OGC 12-168r4, OGC ® Catalog Services Specification v3.0 –General Model. 3 Terms and definitions For the purposes of this report, the definitions specified in Clause 4 of the OWS Common Implementation Standard [OGC 06-121r3], in OGC ® Catalog Services Implementation Specification v2.0.2 [OGC 07-006r1] and OGC Catalogue Services Specification v 3.0 – General Model shall apply. 4 Conventions 4.1 Abbreviated terms CSW Catalogue Services for the Web HTTP Hypertext Transfer Protocol ISO International Organization for Standardization MIME Multipurpose Internet Mail Extensions OGC Open Geospatial Consortium, also referred to as OpenGIS UML Unified Markup Language GEOSS Global Earth Observation System of Systems 3 ebRIM Electronic business Registry Information Model OWL Web Ontology Language RDF Resource Description Framework SPARQL Semantic Web Query Language SWEET Semantic Web for Earth and Environmental Terminology DC Dublin Core PURL Persistent Universal Resource Locator URI Universal Resource Identifier

4.2 UML notation

Most diagrams that appear in this standard are presented using the Unified Modeling Language UML static structure diagram, as described in Subclause 5.2 of [OGC 06- 121r3].

4.3 Used parts of other documents

This document uses significant parts of documents OGC CSW 2.0.2 OGC 07-006r1 and OGC CSW 3.0 12-168r4. To reduce the need to refer to that document, this document copies some of those parts with small modifications. The copied part is cited in the document. 5 OGC IP Engineering Report on Catalogue Service Discovery overview This OGC Engineering Report on Catalogue Service Discovery compares the differences in the information model and in particular, the support to metadata discovery, between the CSW 2.0.2 and CSW 3.0. A clear advancement of CSW 3.0 is the detailed discussion on implementation and interface definition to support federated distributed search. We also examined different techniques to semantically enable the search and discovery component of the CSW catalogue. Figure 1 demonstrates the research questions being answered through this ER.