TDF → TCollection Relation

File in src/TDF	Includes file in src/TCollection
TDF_Delta.hxx	TCollection_ExtendedString.hxx
TDF_GUIDProgIDMap.hxx	TCollection_ExtendedString.hxx
TDF_LabelNode.hxx	TCollection_AsciiString.hxx
TDF_Transaction.hxx	TCollection_AsciiString.hxx