GML Subset schema for gml:_Feature,gml:_FeatureCollection,gml:FeatureCollection,gml:_Coverage,gml:RectifiedGridCoverage,gml:MeasureOrNullListType,gml:Point,gml:LineString,gml:Polygon,gml:LinearRing,gml:Dictionary,gml:_Definition,gml:dictionaryEntry,gml:Dictionary,gml:BaseUnit,gml:ConventionalUnit,gml:DerivedUnit,gml:ProjectedCRS,gml:Conversion,gml:GeographicCRS,gml:centerLineOf,gml:extentOf,gml:QuantityList,gml:GeometryPropertyType,gml:PolygonPropertyType,gml:defaultStyle,gml:MultiSurface,gml:Style,gml:_MetaData, written by gmlSubset.xslt.

			Dictionary schema for GML 3.1.1
			Components to support the lists of definitions.
    Copyright (c) 2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

GML base schema for GML 3
		Components to support the GML encoding model.
		The abstract Schematron rules can be used by any schema that includes gmlBase.
		Copyright (c) 2001-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

    Generic simpleContent components for use in GML
    Copyright (c) 2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Extends the units.xsd and basicTypes.xsd schemas with types for recording measures using specific types of units, especially the measures and units needed for coordinate reference systems and coordinate operations. The specific unit types encoded are length, angle, scale factor, time, area, volume, speed, and grid length. This schema allows angle values to be recorded as single numbers or in degree-minute-second format.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		Parts of this schema are based on Subclause 6.5.7 of ISO/CD 19103 Geographic information - Conceptual schema language, on Subclause A.5.2.2.3 of ISO/CD 19118 Geographic information - Encoding, and on Subclause 4.7 of OpenGIS Recommendation Paper OGC 02-007r4 Units of Measure Use and Definition Recommendations.

Builds on gmlBase.xsd to encode units of measure (or uom), including definitions of units of measure and dictionaries of such definitions. GML 3.0 candidate schema, primary editor: Arliss Whiteside. Last updated 2005-06-22.
	Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
	Parts of this schema are based on Subclause 6.5.7 of ISO/CD 19103 Geographic information - Conceptual schema language, on Subclause A.5.2.2.3 of ISO/CD 19118 Geographic information - Encoding, and on most of OpenGIS Recommendation Paper OGC 02-007r4 Units of Measure Use and Definition Recommendations.

Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Top level GML schema
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Basic support for tracking moving objects and objects with changing state.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

GML Feature schema.
    Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

The temporal schema for GML 3.1 provides constructs for handling time-varying spatial data.
    This schema reflects a partial implementation of the model described in ISO 19108:2002.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

This schema defines "direction" element and type.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

	Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Copyright (c) 2001-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

GML Coverage schema.
        Copyright (c) 2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

GML conformant schema for Values in which the
		    * scalar Value types and lists have their values recorded in simpleContent elements
		    * complex Value types are built recursively
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Grid geometries
    A subset of implicit geometries
    Designed for use with GML Coverage schema, but maybe useful elsewhere as well.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

How to encode coordinate reference system definitions. Builds on referenceSystems.xsd to encode the data needed to define coordinate reference systems, including the specific subtypes of coordinate reference systems.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Coordinate Reference System (SC_) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates, with the exception of the abstract "SC_CRS" class. The "SC_CRS" class is encoded in referenceSystems.xsd, to eliminate the (circular) references from coordinateOperations.xsd to coordinateReferenceSystems.xsd. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2.
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

How to encode coordinate system definitions. Builds on referenceSystems.xsd to encode the data needed to define coordinate systems, including the specific subtypes of coordinate systems.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Coordinate System (CS_) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2.
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

How to encode reference system definitions. Builds on several other parts of GML 3 to encode the data needed to define reference systems.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Reference System (RS_) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2. The SC_CRS class is also encoded here, to eliminate the (circular) references from coordinateOperations.xsd to coordinateReferenceSystems.xsd. The RS_SpatialReferenceSystemUsingGeographicIdentifier class is not encoded, since it is not applicable to coordinate positions. The CI_Citation class is not directly encoded, since such information can be included as metaDataProperty elements which are optionally allowed. A modified version of the EX_Extent (DataType) class from ISO 19115 is currently encoded here, using GML 3 schema types. (A more extensive version of the EX_Extent package might be XML encoded in the future, probably in a separate extent.xsd schema.)
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

How to encode datum definitions. Builds on referenceSystems.xsd to encode the data needed to define datums, including the specific subtypes of datums.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Datum (CD_) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2.
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

How to encode coordinate operation definitions. Builds on referenceSystems.xsd to encode the data needed to define coordinate operations, including Transformations, Conversions, and other specific subtypes of operations.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Coordinate Operation (CC_) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2.
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

How to encode positional data quality information. Builds on units.xsd to encode the data needed to describe the positional accuracy of coordinate operations.
		Copyright (c) 2002-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		This schema encodes the Data Quality (DQ) package of the extended UML Model for OGC Abstract Specification Topic 2: Spatial Referencing by Coordinates. That UML model is adapted from ISO 19111 - Spatial referencing by coordinates, as described in Annex C of Topic 2.
		Caution: The CRS package in GML 3.1 and GML 3.1.1 is preliminary, and is expected to undergo some modifications that are not backward compatible during the development of GML 3.2 (ISO 19136). The GML 3.2 package will implement the model described in the revised version of ISO 19111.

Observation schema for GML 3.1
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Default Style schema for GML 3.1.0
		Copyright (c) 2001-2005 OGC, All Rights Reserved. For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr
		Compliance: reference to ISO Specifications

The Temporal Reference Systems schema for GML 3.1 provides constructs for handling various styles of temporal reference system.
    This schema reflects a partial implementation of the model described in ISO 19108:2002.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

The temporal topology schema for ISO19136 provides constructs for handling topological complexes and
		temporal feature relationships.
		Temporal geometric characteristics of features are represented as instants and periods.
		While, temporal context of features that does not relate to the position of time is described as connectivity relationships
		among instants and periods. These relationships are called temporal topology as they do not change in time,
		as long as the direction of time does not change.
		It is used effectively in the case of describing a family tree expressing evolution of species, an ecological cycle,
		a lineage of lands or buildings, or a history of separation and merger of administrative boundaries.
		This schema reflects a partial yet consistent implementation of the model described in ISO 19108:2002.
    Copyright (c) 2002-2005 OGC, All Rights Reserved.
	For conditions, see OGC Software Notice http://www.opengeospatial.org/about/?page=ipr

Copyright (c) 2006 Open Geospatial Consortium, Inc. All Rights Reserved.  To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .

GML Subset schema for gml:_Object,gml:metaDataProperty,gml:_association,gml:AssociationType,gml:members,gml:Array,gml:curveProperty,gml:LineString,gml:LinearRing,gml:exterior,gml:interior,gml:Polygon,gml:surfaceMember,gml:surfaceProperty,gml:MultiSurface,gml:multiSurfaceProperty,gml:SurfaceInterpolationType,gml_Feature,gml:featureProperty,gml:featureMembers,gml:_FeatureCollection,gml:featureMember,gml:featureMembers,gml:_FeatureCollection,gml:Dictionary,gml:doubleList,gml:pos,gml:pointRep,gml:CircleByCenterPoint,  written by gmlSubset.xslt.
Created using Saxon XSLT processor with the following command  2002-020-13 Paul Daisey U.S. Census
$ java com.icl.saxon.StyleSheet -o gml4xls.xsd gmldep.xml gmlSubset.xslt
//                                                      output file     input file      stylesheet
2003-03-05 - SJDC - commented out various pieces to create a more restricted profile of GML for XLS use.
All changes indicated [SJDC]
2003-03-14 - Marwa Mabrouk - Removed a lot of types only leaving the exact types used by XLS. And made editorial changes to clean up the schema and only leave the types used. The fully commented schema will be retained separately for those interested in researching it

GML profile for WCS

AEW 03/07/22 Changes made:
			Edited documentation of "name" element

JDE 2003-07-28:
			Added indeterminatePosition attribute to timePosition
			Added 11 new elements and types from geometryBasic2d.xsd (to define Polygon, used in CoverageDescription...SpatialDomain)

AEW 03/07/29 Changes made:
			Rearranged elements and types and inserted comments indicating the GML schema from which groups of elements and types were copied or edited into this profile

JDE 2003-07-30 Added TimeDurationType

GML Geometry schema. Copyright (c) 2001,2002 OGC, All Rights Reserved.

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