collectionPredicateLibrary.h File Reference

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Typedefs
using	UsdObjectPredicateLibrary = SdfPredicateLibrary< UsdObject >

Functions
USD_API UsdObjectPredicateLibrary const &	UsdGetCollectionPredicateLibrary ()
	Return the predicate library used to evaluate SdfPathExpressions in UsdCollectionAPI's membershipExpression attributes.

Typedef Documentation

UsdObjectPredicateLibrary

using UsdObjectPredicateLibrary = SdfPredicateLibrary<UsdObject>

Definition at line 38 of file collectionPredicateLibrary.h.

Function Documentation

UsdGetCollectionPredicateLibrary()

USD_API UsdObjectPredicateLibrary const & UsdGetCollectionPredicateLibrary

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Return the predicate library used to evaluate SdfPathExpressions in UsdCollectionAPI's membershipExpression attributes.

This library provides the following predicate functions. Where the documentation says closest-prim, it means the given object if that object is a prim, otherwise the object's owning prim if the object is a property.

abstract(bool isAbstract=true) Return true if the closest-prim's IsAbstract() == isAbstract.

defined(bool isDefined=true) Return true if the closest-prim's IsDefined() == isDefined.

model(bool isModel=true) Return true if the given object is a prim and its IsModel() == isModel. If the given object is not a prim, return false.

group(bool isGroup=true) Return true if the given object is a prim and its IsGroup() == isGroup. If the given object is not a prim, return false.

kind(kind1, ... kindN, strict=false) Return true if the given object is a prim, and its kind metadata (see UsdModelAPI::GetKind()) is one of kind1...kindN (exactly if strict=true, or in the KindRegistry::IsA() sense otherwise). If the given object is not a prim, return false.

specifier(spec1, ... specN) Return true if the given object is a prim and its specifier (see UsdPrim::GetSpecifier()) is one of spec1...specN. The spec1..specN arguments must be unnamed strings: "over", "class", or "def". If the given object is not a prim, return false.

isa(schema1, ... schemaN, strict=false) Return true if the given object is a prim and its typed schema (see UsdPrim::IsA())is exactly one of schema1...schemaN if strict=true, or a subtype of schema1...schemaN if strict=false. If the given object is not a prim, return false.

hasAPI(apiSchema1, ... apiSchemaN, [instanceName=name]) Return true if the given object is a prim and it has an applied API schema (see UsdPrim::HasAPI()) of type apiSchema1...apiSchemaN. If the 'instanceName' argument is supplied, the prim must have an applied API schema with that instanceName. If the given object is not a prim, return false.

variant(set1=selGlob1, ... setN=selGlobN) Return true if the given object is a prim and it has selections matching the literal names or glob patterns selGlob1...selGlobN for the variant sets set1...setN. See UsdPrim::GetVariantSets() and UsdVariantSets::GetVariantSelection(). If the given object is not a prim, return false.