self.md.identification = mdutil.MD_DataIdentification_MOD()
self.md.dataquality = DQ_DataQuality()
self.md.distribution = MD_Distribution()
self.md.identification.extent = EX_Extent()
self.md.identification.extent.boundingBox = EX_GeographicBoundingBox()
self.md.referencesystem=MD_ReferenceSystem(None)