The service shall support the BBOX spatial operator defined in the OGC Filter Encoding 2.0 Encoding Standard.
The service shall support the During temporal operator defined in the OGC Filter Encoding 2.0 Encoding Standard.
The service should support other filtering based on the operators defined in the OGC Filter Encoding 2.0 Encoding Standard.
The temporal extension (WFS-TE) shall be used to support advanced temporal filtering.
As a minimum use case number 3 (Retrieve all time slices of a feature relevant for (i.e. affecting the state at) a point in time) defined in the temporal extension (WFS-TE) shall be supported.
The other uses cases defined in the temporal extension (WFS-TE) should be supported.
The service may support other filters on a case by case basis.
Example: other filters defined on a case by case basis are PARALLEL_TO and PERPENDICULAR_TO.