Constraint	Checking	Details
<<Animation Related Organizing Principle>>	Full	Part (a) is checked by syntax_checker. Part (b) is checked by rules_checker.
<<Characteristics Of Property Table Reference>>	Full	Checked by rules_checker.
<<Classification Data Constraints>>	Partial	The portions involving direct attachment and inheritance from a classification related aggregate are checked by rules_checker.
<<Colour Mapping Constraints>>	Partial	Part (a) is checked by syntax_checker. Parts (b), (c), and (d) are not checked.
<<Colour Table Size>>	Full	Checked by rules_checker.
<<Conformal Behaviour Constraints>>	None
<<Constraints On Associates>>	Partial	Checked for <Interface Template> associations to <Variable> instances.
<<Constraints On Components>>	None
<<Contained Edge Constraints>>	None
<<Contained Node Constraints>>	Partial	Part (a).2 is partially checked by rules_checker - at feature topology level 3, any <Feature Node> instance that is not associated with an edge will be reported if it is not associated with a <Feature Face> instance.
<<Continuous LOD Constraints>>	Partial	Part (a) is checked by rules_checker. Part (b) is not checked.
<<Control Link Constraints>>	Partial	Syntax checker enforces some of the field value constraints, rules checker enforces others.
<<Cylindrical Structure>>	Partial	Part (a) is checked by rules_checker. Part (b) is not checked.
<<Distinct Geometric Centre>>	None
<<Distinct Link Objects>>	Partial	Checked by rules_checker for the following classes: <Alternate Hierarchy Related Features> <Alternate Hierarchy Related Geometry> <Classification Related Features> <Classification Related Geometry> <Feature Model Instance> <Geometry Model Instance> <LOD Related Features> <LOD Related Geometry> <Octant Related Features> <Octant Related Geometry> <Quadrant Related Features> <Quadrant Related Geometry> <Spatial Index Related Features> <Spatial Index Related Feature Topology> <Spatial Index Related Geometry> <State Related Features> <State Related Geometry> <Time Related Features> <Time Related Geometry> Still unchecked: <Perimeter Related Features> <Perimeter Related Feature Topology> <Perimeter Related Geometry> <Perimeter Related Geometry Topology>
<<Distinct Time Significance>>	Full	Checked by rules_checker.
<<Edges Bordering Faces>>	Partial	Part (a) is checked by rules_checker.
<<Environment Root SRF>>	Partial	All parts are checked by rules_checker, although 'extended' coordinates are not allowed for.
<<Face Direction Levels 0 3>>	Partial	Checked by rules_checker for the relationship between <Feature Face> and <Areal Feature>.
<<Face Ring Edge Consistency>>	Full	Checked by rules_checker.
<<Faces Bordering Volumes>>	Partial	Checked by rules_checker (the association from <Feature Face> to <Feature Volume> required by SE_FTL_FIVE).
<<Feature Edge Constraints>>	Partial	Part (a) is checked by rules_checker. Parts (b) through (f) are not checked.
<<Finite Element Mesh Structure>>	Partial	Part (a) is checked by syntax_checker. Part (b) is checked by rules_checker. Parts (c) through (f) are not checked.
<<General Axis Constraints>>	Partial	Part (a) is checked by syntax_checker. Part (b) is checked by syntax_checker, except that the scale restriction for (b)4 is not checked. Part (c) is checked by syntax_checker, except that the scale restriction for (c)3 is not checked. Part (d) is checked by syntax_checker, except that the scale restriction for (d)4 is not checked.
<<Hierarchy Summary Constraints>>	Partial	Part (a) is checked by syntax_checker. Parts (b), (c), and (d) are checked by rules_checker. Part (e) is checked by rules_checker to the extent that the associates shall match the class value, but does not check the DRM Class and EDCS Usage summary information against the structure being summarized.
<<Homogeneous Light Rendering Properties>>	Full	Checked by rules_checker.
<<Image Anchor SRF>>	Partial	Checked by rules_checker, except that collinearity is not checked, and for non-planar projections the orthogonal axes constraint is not checked.
<<Image Mapping Functions and Texture Coordinates>>	Partial	Checked by rules_checker. In the case where one or more <Property Set Index> instances are in the context, however, the context is not completely checked.
<<Index Codes within Tables>>	Partial	Part (a) is checked by rules_checker.
<<Inheritance Rule For Location>>	None
<<Legal Time Ranges>>	Full	Checked by syntax_checker.
<<Linear Geometry Structure>>	Partial	Part (a) is checked by syntax_checker. Part (b) is checked by rules_checker. Parts (c) and (d) are not checked.
<<LOD Related Organizing Principle>>	Partial	Part (a) is checked by rules_checker. Parts (b) and (c) are not checked.
<<LSR Transformation Components>>	Partial	The rules_checker utility verifies that the presence of the components conforms with the constraint, but if both representations are present, does not check that they are mathematically equivalent.
<<Mandatory Metadata>>	Partial	The syntax_checker utility enforces this constraint, except for the following: URN validation email address validation web_site validation
<<Model Reference Type Constraints>>	Partial	Part (a) is checked by rules_checker. Part (b).1 is not checked. Part (b).2 is checked by syntax_checker.
<<Model SRF>>	Partial	Part (a) is partially checked. Part (a).1 is not checked, while part (a).2 is checked by syntax_checker. Part (b) is not checked. Part (c) is checked by rules_checker.
<<Nested Primitive Geometry>>	Partial	The constraints affecting <Finite Element Mesh>, <Polyhedron>, and <Volume Object> are not checked.
<<Non Cyclic Aggregations>>	None
<<Non Empty Environment Root Instance>>	Full	Checked by rules_checker.
<<Non Empty Model Instance>>	Full	Checked by rules_checker.
<<Non Overlapping DRM Class Summary Item Instances>>	Full	Checked by rules_checker, which checks whether the list is overlapping. However, currently rules_checker does not guarantee that the DRM class summary actually corresponds to the data being summarized.
<<Non Self Overlapping Perimeter Data Locations>>	Partial	Checked by rules_checker, which checks only whether the <Perimeter Data> <Location> components specify distinct locations in space.
<<Octant Related Organizing Principle>>	Partial	Partially checked by rules_checker, which currently ensures that the required <Spatial Extent> instances are present, but not that their relationships with one another are compliant.
<<Parallelepiped Structure>>	Full	Checked by rules_checker.
<<Perimeter Related Organizing Principle>>	None
<<Polygon As Bounded Plane>>	Partial	Part (a) is checked by rules_checker.
<<Polyhedron Structure>>	None
<<Precedence of Property Set Index>>	None	Not applicable; this is not a checkable constraint but rather specifies precedence for operations.
<<Presentation Domain Constraints>>	Partial	rules_checker checks this constraint, but does not check whether the <Presentation Domain> components of sibling <Colour> instances are distinct or whether those of sibling <Image Mapping Function> instances are distinct.
<<Primitive Summary Item Constraints>>	Partial	Part (a) is checked by syntax_checker.
<<Property Characteristic Constraints>>	Partial	Part (a) is not checked. Part (b) is checked by syntax_checker. Part (c).1 is checked by rules_checker.
<<Property Constraints>>	Partial	Part (a) is checked by syntax_checker. Parts (b) and (c) are partially checked by rules_checker, but only where the meaning field values are specified by EDCS Attribute Codes.
<<Property Grid Constraints>>	None
<<Property Set Table Size>>	Full	Checked by rules_checker.
<<Publishable Object>>	None	This is enforced by SE_PublishObject().
<<Quadrant Related Organizing Principle>>	Partial	Part (a) is checked by rules_checker. Part (b).1 is partially checked. Part (c) is checked by syntax_checker and rules_checker.
<<Required Reference Vector Location>>	Full	Checked by rules_checker.
<<Separating Plane Related Organizing Principle>>	Partial	Part (a) is checked by rules_checker, which also checks that each <Separating Plane> is specified by three distinct positions.
<<Spatial Axis Constraints>>	Partial	Part (a) is a definition of spatial <Axis> rather than a checkable constraint. Parts (b), (c), and (d) are checked by rules_checker.
<<Spatial Index Related Organizing Principle>>	Partial	Part (a) is checked by syntax_checker, apart from (a).3.3, which is not checked. Part (b) is not checked.
<<State Related Organizing Principle>>	Partial	Parts (a) and (b) are checked by syntax_checker. Part (c) is not checked.
<<Table Property Description Constraints>>	Partial	Checked by syntax_checker, except for the scale restrictions in part (c). Uniqueness within a given <Data Table> instance is checked by rules_checker.
<<Time Dependency>>	Full	Part (e) is checked by syntax_checker, the rest by rules_checker.
<<Time Interval Calculation>>	Full	Checked by rules_checker.
<<Union Organizing Principle>>	Partial	Checked by syntax_checker, except for the second part of (d), which is not checked.
<<Valid Node Edge Relationships>>	Full	The checkable portion (that which is not defined by the syntax) is checked by rules_checker.
<<Variable Meaning Constraints>>	Partial	Checked by syntax_checker, apart from the scale restrictions in part (c) which are not checked.
<<Volume Shell Face Consistency>>	Full	Checked by rules_checker.