OpenGIS Catalogue Service Implementation Specification
1) Overview
2) Downloads
3) Official Schemas
4) Related News
1) Overview
The OpenGIS® Catalogue Services Interface Standard (CAT) supports the ability to publish and search collections of descriptive information (metadata) about geospatial data, services and related resources. Providers of resources use catalogues to register metadata that conform to the provider's choice of an information model; such models include descriptions of spatial references and thematic information. Client applications can then search for geospatial data and services in very efficient ways.
See also the OGC Catalogue 2.0 Accessibility for OWS-3 Discussion Paper [http://www.opengeospatial.org/standards/dp], the OWS-4 CSW ebRIM Modelling Guidelines Interoperability Program Report (IPR) [www.opengeospatial.org/standards/dp] and the OpenGIS® Catalogue Service Interface Standard 2.0.1 - FGDC CSDGM Application Profile for CSW (Best Practice) [http://www.opengeospatial.org/standards/bp].
2) Downloads
3) Official Schemas
Catalogue Service for Web (CSW) has schemas at http://schemas.opengis.net/csw/
Note: You may also download All Official OGC Schemas in a single zip file.