IdDictDetDescrCnv → AtlasDetDescr Relation

File in DetectorDescription/IdDictDetDescrCnv	Includes file in DetectorDescription/AtlasDetDescr
src / AtlasIDDetDescrCnv.cxx	AtlasDetDescr / AtlasDetectorID.h
src / IdDictCnvTest.cxx	AtlasDetDescr / AtlasDetectorID.h