Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms, definitions, symbols and abbreviated terms
5 Geometry packages
6 Topology packages
Annex A (informative) - Supported specifications
Annex B (normative) - Abstract test suite
Annex C (informative) - Extending the core
Annex D (informative) - Examples
Bibliography