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Oct 11, 2023
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fix bad links #22

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38 changes: 19 additions & 19 deletions README.md
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Expand Up @@ -58,21 +58,21 @@
- **Title:** Filter
- **OpenAPI specification:** [openapi.yaml](openapi.yaml)
- **Conformance Classes:**
- Filter: <http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/filter>
- Features Filter: <http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/features-filter>
- Item Search Filter: <https://api.stacspec.org/v1.0.0-rc.2/item-search#filter>
- CQL2 Text: <http://www.opengis.net/spec/cql2/1.0/conf/cql2-text>
- CQL2 JSON: <http://www.opengis.net/spec/cql2/1.0/conf/cql2-json>
- Basic CQL2: <http://www.opengis.net/spec/cql2/1.0/conf/basic-cql2>
- Advanced Comparison Operators: <http://www.opengis.net/spec/cql2/1.0/conf/advanced-comparison-operators>
- Basic Spatial Operators: <http://www.opengis.net/spec/cql2/1.0/conf/basic-spatial-operators>
- Spatial Operators: <http://www.opengis.net/spec/cql2/1.0/conf/spatial-operators>
- Temporal Operators: <http://www.opengis.net/spec/cql2/1.0/conf/temporal-operators>
- Custom Functions: <http://www.opengis.net/spec/cql2/1.0/conf/functions>
- Arithmetic Expressions: <http://www.opengis.net/spec/cql2/1.0/conf/arithmetic>
- Array Operators: <http://www.opengis.net/spec/cql2/1.0/conf/array-operators>
- Property-Property Comparisons: <http://www.opengis.net/spec/cql2/1.0/conf/property-property>
- Accent and Case-insensitive Comparison: <http://www.opengis.net/spec/cql2/1.0/conf/accent-case-insensitive-comparison>
- Filter: `http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/filter`
- Features Filter: `http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/features-filter`
- Item Search Filter: `https://api.stacspec.org/v1.0.0-rc.2/item-search#filter`
- CQL2 Text: `http://www.opengis.net/spec/cql2/1.0/conf/cql2-text`
- CQL2 JSON: `http://www.opengis.net/spec/cql2/1.0/conf/cql2-json`
- Basic CQL2: `http://www.opengis.net/spec/cql2/1.0/conf/basic-cql2`
- Advanced Comparison Operators: `http://www.opengis.net/spec/cql2/1.0/conf/advanced-comparison-operators`
- Basic Spatial Operators: `http://www.opengis.net/spec/cql2/1.0/conf/basic-spatial-operators`
- Spatial Operators: `http://www.opengis.net/spec/cql2/1.0/conf/spatial-operators`
- Temporal Operators: `http://www.opengis.net/spec/cql2/1.0/conf/temporal-operators`
- Custom Functions: `http://www.opengis.net/spec/cql2/1.0/conf/functions`
- Arithmetic Expressions: `http://www.opengis.net/spec/cql2/1.0/conf/arithmetic`
- Array Operators: `http://www.opengis.net/spec/cql2/1.0/conf/array-operators`
- Property-Property Comparisons: `http://www.opengis.net/spec/cql2/1.0/conf/property-property`
- Accent and Case-insensitive Comparison: `http://www.opengis.net/spec/cql2/1.0/conf/accent-case-insensitive-comparison`
- **Scope:** STAC API - Features, STAC API - Item Search
- **[Extension Maturity Classification](https://github.com/radiantearth/stac-api-spec/tree/main/README.md#maturity-classification):** Pilot
- **Dependencies:**
Expand Down Expand Up @@ -238,9 +238,9 @@ Formal definitions and grammars for CQL2 can be found in the
a BNF grammar for CQL2 Text and both a JSON Schema and an OpenAPI specification for CQL2 JSON.
The standalone files are:

- [cql.bnf](https://github.com/opengeospatial/ogcapi-features/blob/master/extensions/cql/standard/schema/cql.bnf)
- [cql.json](https://github.com/opengeospatial/ogcapi-features/blob/master/extensions/cql/standard/schema/cql.json)
- [cql.yml](https://github.com/opengeospatial/ogcapi-features/blob/master/extensions/cql/standard/schema/cql.yml)
- [cql2.bnf](https://github.com/opengeospatial/ogcapi-features/blob/master/cql2/standard/schema/cql2.bnf)
- [cql2.json](https://github.com/opengeospatial/ogcapi-features/blob/master/cql2/standard/schema/cql2.json)
- [cql2.yml](https://github.com/opengeospatial/ogcapi-features/blob/master/cql2/standard/schema/cql2.yml)

These projects have or are developing CQL2 support:

Expand All @@ -253,7 +253,7 @@ These projects have or are developing CQL2 support:
- [xtraplatform-spatial](https://github.com/interactive-instruments/xtraplatform-spatial) has support for CQL2 Text and provides an [ANTLR 4 grammer](https://github.com/interactive-instruments/xtraplatform-spatial/tree/master/xtraplatform-cql/src/main/antlr/de/ii/xtraplatform/cql/infra)
- [Geotools](https://github.com/geotools/geotools) has support for [CQL2 text](https://github.com/geotools/geotools/tree/main/modules/library/cql/src/main/java/org/geotools/filter/text/cql2)

Note that the [xbib CQL library (JVM)](https://github.com/xbib/cql) is the OASIS Contextual Query Language, not
Note that the xbib CQL library (JVM) is the OASIS Contextual Query Language, not
OGC CQL, and should not be used to implement this extension, as they are significantly different query languages.
[Stacatto](https://github.com/planetlabs/staccato) uses this for their query language implementation, but it is
not compliant with this extension.
Expand Down