esf → usd Relation

File in pxr/exec/esf	Includes file in pxr/usd
attribute.h	sdf / path.h
attribute.h	sdf / valueTypeName.h
attributeQuery.h	sdf / path.h
attributeQuery.h	usd / timeCode.h
journal.h	sdf / path.h
object.h	sdf / path.h
prim.h	sdf / path.h
property.h	sdf / path.h
relationship.h	sdf / path.h