Common Query Language (CQL2) - Open Geospatial Consortium

Common Query Language (CQL2)

This standard is a generic filter grammar that can be used to specify how resource instances in a source collection of any item type, including features, can be filtered to identify a results set. Typically, CQL2 is used in query operations to identify the subset of resources, such as features, that should be included in a response document.

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Document title Version OGC Doc No. Type
Common Query Language (CQL2) 1.0.0 21-065r2 IS

Official model files and encoding schemas

Official Schemas

http://schemas.opengis.net/cql2/

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Overview

The Common Query Language (CQL2) Standard is a generic filter grammar that can be used to specify how resource instances in a source collection of any item type, including features, can be filtered to identify a results set. Typically, CQL2 is used in query operations to identify the subset of resources, such as features, that should be included in a response document. However, CQL2 can also be used in other operations, such as updates, to identify the subset of resources that should be affected by an operation.

CQL2 specifies:

  • A JSON encoding for the grammar.
  • A filter grammar;
  • A text encoding for the grammar;