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Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Conventions
  5.1 Abbreviated terms
  5.2 UML Notation
  5.3 Use of examples
  5.4 Namespaces
  5.5 KVP-encoded parameter lists
6 Query expressions
  6.1 Introduction
  6.2 Abstract query expressions
  6.3 Ad hoc query expression
       6.3.1 Introduction
       6.3.2 XML encoding
       6.3.3 KVP-encoding
7 Filter
  7.1 Introduction
  7.2 Encoding
  7.3 Expressions
       7.3.1 Introduction
       7.3.2 Encoding
  7.4 Value references
       7.4.1 Introduction
       7.4.2 Encoding
       7.4.3 Property names in GML
       7.4.4 XPath expressions
  7.5 Literals
       7.5.1 Introduction
       7.5.2 Encoding
  7.6 Functions
       7.6.1 Introduction
       7.6.2 Encoding
  7.7 Comparison operators
       7.7.1 Introduction
       7.7.2 Encoding
  7.8 Spatial operators
       7.8.1 Introduction
       7.8.2 Encoding
       7.8.3 Coordinate reference system handling
  7.9 Temporal operators
       7.9.1 Introduction
       7.9.2 Encoding
       7.9.3 Time zone handling
  7.10 Logical operators
       7.10.1 Introduction
       7.10.2 Encoding
  7.11 Object identifiers
       7.11.1 Introduction
       7.11.2 Encoding
  7.12 Extensions
       7.12.1 Introduction
       7.12.2 Extending filter using the fes:Function element
       7.12.3 Extending filter by adding new elements
  7.13 Filter capabilities
  7.14 Encoding
       7.14.1 Capability categories
       7.14.2 Id capabilities
       7.14.3 Scalar capabilities
       7.14.4 Spatial capabilities
       7.14.5 Temporal capabilities
       7.14.6 Functions
       7.14.7 Extended capabilities
8 Sorting
  8.1 Introduction
  8.2 Encoding
  8.3 Exceptions
Annex A (normative) - Conformance testing
  A.1 Abstract test suite for filter functionality
       A.1.1 Test cases for query
       A.1.2 Test cases for ad-hoc query
       A.1.3 Test cases for scalar filter
       A.1.4 Test cases for BBOX filter
       A.1.5 Test cases for spatial filter
       A.1.6 Test cases for temporal filter
       A.1.7 Test cases for versioning
       A.1.8 Test cases for sorting
Annex B (informative) - Filter schema definitions
  B.1 Introduction
  B.2 Schema files
       B.2.1 expr.xsd
       B.2.2 filter.xsd
       B.2.3 query.xsd
       B.2.4 sort.xsd
       B.2.5 filterCapabilities.xsd
       B.2.6 filterAll.xsd
Annex C (informative) - Examples
  C.1 Introduction
  C.2 XPath example
  C.3 XPath predicate example
  C.4 XPath schema-element() example
  C.5 Filter examples
  C.6 SortBy example
  C.7 Temporal filter example
  C.8 Filter capabilities examples
Annex D (informative) - EBNF for XPath subset
Annex E (informative) - Abstract model