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
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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;