Welcome to the OGC Definitions Server

The OGC Definitions Server publishes a range of resources managed by the OGC, and identified by unique stable web addresses (IRIs or URIs). These are determined through a set of policies managed by the OGC Naming Authority and managed through normal operational processes.

The knowledge graph behind the definitions server is flexible and extensible, and the OGC will continue to register new terms and improve the cross-linkages between terms.

Definitions are made available in an interoperable form using the SKOS vocabulary (or "taxonomy") model in both human- and machine-readable forms.

Some definitions have richer information models with alternative profiles of the content available.

Vocabularies are managed in sets called "ConceptSchemes", and definitions can usually be accessed individually as "Concepts" or via the containing set.

The "alternate profiles" will provide a complete list of the available resources per definition.

NOTE: Updates to the Definitions Server since June 2022 may require you to clear your web browser's cache for the opengis.net domain. This is a one-time only action to ensure that your web browser is displaying the latest information from the Definitions Server.

See the Definitions Server About Page for more information about the OGC Definitions Server.

Contents

Content is organised into Collections by the source and governance domain.

Click the carets next to each Collection to expand

expand all, click '+' to expand individually

• definitions identified by OGC URIs
  • OGC Definitions
• OGC definition types
  • datatypes
  • OGC nils
  • Service Types register
  • Specification elements
  • units of measure definitions
• OGC Naming Authority registers
  • Specification elements
  • OGC resource types

See About page for more information about VocPrez.