gml.xsd

			A profile of OpenGeospatialConsortium (OpenGIS, OGC) Geography Markup Language (GML) version 3.1.1 schemas for niem version 1.0.   Deprecated GML3.1.1 types like gid are eliminated because they will not be included in the ISO TC/211 19136 version of the GML standard.			
			
			This GML profile includes AssociationAttributeGroup even though niem version 0.2 uses IDREF and IDREFS instead of xlink:href.
			GML Simple Features does not allow XLinks, and OpenLS does not use them.  But they are used for the GML definitions for 
			Coverages, Moving Objects, and throughout the schemas for Observations and Measurements.  The attributes in the xlink:simpleLink 
			attributeGroup referenced by gml:AssociationAttributeGroup are optional.  So their use in instance documents may be avoided 
			where not allowed or customary.
		
     		2006-09-28 Changed namespaces and schema location
     		
				ns old	http://niem.gov/niem/external/gml/3.1.1/dhs-gmo/1.0.0
				ns new	http://niem.gov/niem/external/ogc-gml/3.1.1/dhs-gmo/1.0.0	
					
				ns old	http://niem.gov/niem/external/xlink/1.0.0/dhs-gmo/1.0.0
				ns new	http://niem.gov/niem/external/w3c-xlink/1.0/dhs-gmo/1.0.0		
				from		../../../../xlink/1.0.0/dhs-gmo/1.0.0/xlinks.xsd
				to			../../../../w3c-xlink/1.0/dhs-gmo/1.0.0/xlinks.xsd

			2006-09-21 Changes
				1.  Change namespaces following NIEM conventions
					a) targetNamespace 	http://niem.gov/niem/external/gml/3.1.1/dhs-gmo/1.0.0
					b) xlink namespace	http://niem.gov/niem/external/xlink/1.0.0/dhs-gmo/1.0.0
					
			2006-09-19 Changes
				add definitions used by ISO 19139 Metadata
				put metadataProperty back in StandardObjectProperties and DefinitionType to support referenceSystems definitions that use it

			2006-09-04 Changes
			
				1.  Change namespaces following conventions proposed in OGC 05-065r3 to include version and profile information, 
				      except that complete version is used instead of BNF "principle version".  
				      a) targetNamespace was http://www.opengis.net/gml; changed to http://www.opengis.net/gml/3.1.1/DHS-GMO/1.0.0
					  b) xlink namespace was http://www.w3.org/1999/xlink; changed to http://www.w3.org/1999/xlink/1.0.0/OGC-DHS-GMO/1.0.0
				2.  Change xlink import to point to xlink schema in its own versioned directory instead of deprecated schema that references it.
				3.  Include complete OGC copyright notice from http://www.opengeospatial.org/ogc/software
				
			2006-04-14 Changes
				move to proposed external directory structure
				change path to xlinks.xsd
				
			2006-01-02 Changes
			  include appinfo source="" to document source of definitions
			  include base, units, measures, values, temporal, coverage
		 	
		 	2006-01-03
		 	  include observations
		 	
		 	2006-01-05
		 	  add documentation
		 	      
		 	2006-01-09
		 	  add back in empty AssociationAttributeGroup
		 	  
		 	     
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