gmlgeorss311.xsd

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:sch="http://www.ascc.net/xml/schematron" xmlns:gml="http://www.opengis.net/gml" targetNamespace="http://www.opengis.net/gml" elementFormDefault="qualified" version="3.1.1">
	<annotation>
		<documentation>GML Profile schema for gml:Point,gml:LineString,gml:Polygon,gml:Envelope, gml:CirclebyCenterpoint  written by Joshua Lieberman. </documentation>
		<documentation>for use by the GeoRSS v. 1.1 application schema</documentation>
		<documentation>most optional elements of the full schema have been removed for simplicity</documentation>
		<documentation>this profile includes gml:AbstractFeature to support creation of GML feature schemas as well which are geometry-compatible with GeoRSS, but not themselves valid GeoRSS</documentation>
		<documentation>Generated by Joshua Lieberman - June 2007</documentation>
	</annotation>
	<!-- ================================================= -->
	<element name="Point" type="gml:PointType" substitutionGroup="gml:_GeometricPrimitive"/>
	<!-- ================================================= -->
	<complexType name="PointType">
		<annotation>
			<documentation>A Point is defined by a single coordinate tuple.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGeometricPrimitiveType">
				<sequence>
					<choice>
						<annotation>
							<documentation>GML supports two different ways to specify the direct poisiton of a point. 1. The "pos" element is of type DirectPositionType.</documentation>
						</annotation>
						<element ref="gml:pos"/>
					</choice>
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<element name="pos" type="gml:DirectPositionType">
		<annotation>
			<appinfo>
				<sch:pattern>
					<sch:rule context="gml:pos">
						<sch:extends rule="CRSLabels"/>
					</sch:rule>
				</sch:pattern>
			</appinfo>
		</annotation>
	</element>
	<!-- ================================================= -->
	<complexType name="DirectPositionType">
		<annotation>
			<documentation>DirectPosition instances hold the coordinates for a position within some coordinate reference system (CRS). Since DirectPositions, as data types, will often be included in larger objects (such as geometry elements) that have references to CRS, the "srsName" attribute will in general be missing, if this particular DirectPosition is included in a larger element with such a reference to a CRS. In this case, the CRS is implicitly assumed to take on the value of the containing object's CRS.</documentation>
		</annotation>
		<simpleContent>
			<extension base="gml:doubleList">
				<attributeGroup ref="gml:SRSReferenceGroup"/>
			</extension>
		</simpleContent>
	</complexType>
	<!-- ================================================= -->
	<simpleType name="doubleList">
		<annotation>
			<documentation>XML List based on XML Schema double type.  An element of this type contains a space-separated list of double values</documentation>
		</annotation>
		<list itemType="double"/>
	</simpleType>
	<!-- ================================================= -->
	<element name="LineString" type="gml:LineStringType" substitutionGroup="gml:_Curve"/>
	<!-- ================================================= -->
	<complexType name="LineStringType">
		<annotation>
			<documentation>A LineString is a special curve that consists of a single segment with linear interpolation. It is defined by two or more coordinate tuples, with linear interpolation between them. It is backwards compatible with the LineString of GML 2, GM_LineString of ISO 19107 is implemented by LineStringSegment.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractCurveType">
				<sequence>
					<choice>
						<annotation>
							<documentation>GML supports two different ways to specify the control points of a line string. 1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve (reuse of existing points). 2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve only. The number of direct positions in the list must be at least two.</documentation>
						</annotation>
						<element ref="gml:posList"/>
					</choice>
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<element name="posList" type="gml:DirectPositionListType">
		<annotation>
			<appinfo>
				<sch:pattern>
					<sch:rule context="gml:posList">
						<sch:extends rule="CRSLabels"/>
					</sch:rule>
				</sch:pattern>
			</appinfo>
			<appinfo>
				<sch:pattern>
					<sch:rule context="gml:posList">
						<sch:extends rule="Count"/>
					</sch:rule>
				</sch:pattern>
			</appinfo>
		</annotation>
	</element>
	<!-- ================================================= -->
	<complexType name="DirectPositionListType">
		<annotation>
			<documentation>DirectPositionList instances hold the coordinates for a sequence of direct positions within the same coordinate reference system (CRS).</documentation>
		</annotation>
		<simpleContent>
			<extension base="gml:doubleList">
				<attributeGroup ref="gml:SRSReferenceGroup"/>
				<attribute name="count" type="positiveInteger" use="optional">
					<annotation>
						<documentation>"count" allows to specify the number of direct positions in the list. If the attribute “count” is present then the attribute “srsDimension” shall be present, too.</documentation>
					</annotation>
				</attribute>
			</extension>
		</simpleContent>
	</complexType>
	<!-- =========================================================== -->
	<!-- Envelope -->
	<!-- =========================================================== -->
	<element name="Envelope" type="gml:EnvelopeType"/>
	<!-- =========================================================== -->
	<complexType name="EnvelopeType">
		<annotation>
			<documentation>Envelope defines an extent using a pair of positions defining opposite corners in arbitrary dimensions. The first direct position is the "lower corner" (a coordinate position consisting of all the minimal ordinates for each dimension for all points within the envelope), the second one the "upper corner" (a coordinate position consisting of all the maximal ordinates for each dimension for all points within the envelope).</documentation>
		</annotation>
		<choice>
			<sequence>
				<element name="lowerCorner" type="gml:DirectPositionType"/>
				<element name="upperCorner" type="gml:DirectPositionType"/>
			</sequence>
		</choice>
		<attributeGroup ref="gml:SRSReferenceGroup"/>
	</complexType>
	<!-- =========== global element in "_CurveSegment" substitution group ================ -->
	<element name="CircleByCenterPoint" type="gml:CircleByCenterPointType" substitutionGroup="gml:ArcByCenterPoint"/>
	<!-- =========================================================== -->
	<complexType name="CircleByCenterPointType">
		<annotation>
			<documentation>A CircleByCenterPoint is an ArcByCenterPoint with identical start and end angle to form a full circle. Again, this represenation can be used only in 2D.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:ArcByCenterPointType"/>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<element name="Polygon" type="gml:PolygonType" substitutionGroup="gml:_Surface"/>
	<!-- ================================================= -->
	<complexType name="PolygonType">
		<annotation>
			<documentation>A Polygon is a special surface that is defined by a single surface patch. The boundary of this patch is coplanar and the polygon uses planar interpolation in its interior. It is backwards compatible with the Polygon of GML 2, GM_Polygon of ISO 19107 is implemented by PolygonPatch.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractSurfaceType">
				<sequence>
					<!-- This profile restricts polygons to one exterior ring and no interior rings -->
					<element ref="gml:exterior"/>
					<!--               <element ref="gml:interior" minOccurs="0" maxOccurs="unbounded"/>
-->
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- =========================================================== -->
	<element name="LinearRing" type="gml:LinearRingType" substitutionGroup="gml:_Ring"/>
	<!-- =========================================================== -->
	<complexType name="LinearRingType">
		<annotation>
			<documentation>A LinearRing is defined by four or more coordinate tuples, with linear interpolation between them; the first and last coordinates must be coincident.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractRingType">
				<sequence>
					<choice>
						<annotation>
							<documentation>GML supports two different ways to specify the control points of a linear ring.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this ring, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this ring (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this ring only. The number of direct positions in the list must be at least four.</documentation>
						</annotation>
						<element ref="gml:posList"/>
					</choice>
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<element name="exterior" type="gml:AbstractRingPropertyType">
		<annotation>
			<documentation>A boundary of a surface consists of a number of rings. In the normal 2D case, one of these rings is distinguished as being the exterior boundary. In a general manifold this is not always possible, in which case all boundaries shall be listed as interior boundaries, and the exterior will be empty.</documentation>
		</annotation>
	</element>
	<!-- =========== global element in "_CurveSegment" substitution group ================ -->
	<element name="ArcByCenterPoint" type="gml:ArcByCenterPointType" substitutionGroup="gml:_CurveSegment"/>
	<!-- =========================================================== -->
	<complexType name="ArcByCenterPointType">
		<annotation>
			<documentation>
				This variant of the arc requires that the points on the arc have to be computed instead of storing the coordinates directly. The control point is the center point of the arc plus the radius and the bearing at start and end. This represenation can be used only in 2D.
			</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractCurveSegmentType">
				<sequence>
					<choice>
						<annotation>
							<documentation>GML supports two different ways to specify the control points of a curve segment.
1. A "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) element. The "pos" element contains a center point that is only part of this curve segment, a "pointProperty" element contains a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element can be used to specifiy the coordinates of the center point, too. The number of direct positions in the list must be one.</documentation>
						</annotation>
						<choice>
							<element ref="gml:pos"/>
						</choice>
					</choice>
					<element name="radius" type="gml:LengthType">
						<annotation>
							<documentation>The radius of the arc.</documentation>
						</annotation>
					</element>
				</sequence>
				<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArcCenterPointWithRadius">
					<annotation>
						<documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".</documentation>
					</annotation>
				</attribute>
				<attribute name="numArc" type="integer" use="required" fixed="1">
					<annotation>
						<documentation>Since this type describes always a single arc, the attribute is fixed to "1".</documentation>
					</annotation>
				</attribute>
			</extension>
		</complexContent>
	</complexType>
	<!-- =========================================================== -->
	<!-- predefined simple types (enumerations, simple typed arrays) -->
	<!-- =========================================================== -->
	<simpleType name="CurveInterpolationType">
		<annotation>
			<documentation>CurveInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an
application schema.</documentation>
		</annotation>
		<restriction base="string">
			<enumeration value="linear"/>
			<enumeration value="geodesic"/>
			<enumeration value="circularArc3Points"/>
			<enumeration value="circularArc2PointWithBulge"/>
			<enumeration value="circularArcCenterPointWithRadius"/>
			<enumeration value="elliptical"/>
			<enumeration value="clothoid"/>
			<enumeration value="conic"/>
			<enumeration value="polynomialSpline"/>
			<enumeration value="cubicSpline"/>
			<enumeration value="rationalSpline"/>
		</restriction>
	</simpleType>
	<!-- ================================================= -->
	<simpleType name="NCNameList">
		<annotation>
			<documentation>A set of values, representing a list of token with the lexical value space of NCName. The tokens are seperated by whitespace.</documentation>
		</annotation>
		<list itemType="NCName"/>
	</simpleType>
	<!-- ================================================= -->
	<complexType name="LengthType">
		<annotation>
			<documentation>Value of a length (or distance) quantity, with its units. Uses the MeasureType with the restriction that the unit of measure referenced by uom must be suitable for a length, such as metres or feet. </documentation>
		</annotation>
		<simpleContent>
			<extension base="gml:MeasureType"/>
		</simpleContent>
	</complexType>
	<!-- =========================================================== -->
	<complexType name="MeasureType">
		<annotation>
			<documentation>Number with a scale.  
      The value of uom (Units Of Measure) attribute is a reference to a Reference System for the amount, either a ratio or position scale. </documentation>
		</annotation>
		<simpleContent>
			<extension base="double">
				<attribute name="uom" type="anyURI" use="required"/>
			</extension>
		</simpleContent>
	</complexType>
	<!-- ================================================= -->
	<!-- The rest of the elements in this schema profile are abstract types or elements. -->
	<!-- ================================================= -->
	<complexType name="AbstractGeometricPrimitiveType" abstract="true">
		<annotation>
			<documentation>This is the abstract root type of the geometric primitives. A geometric primitive is a geometric object that is not decomposed further into other primitives in the system. All primitives are oriented in the direction implied by the sequence of their coordinate tuples.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGeometryType"/>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<complexType name="AbstractGeometryType" abstract="true">
		<annotation>
			<documentation>All geometry elements are derived directly or indirectly from this abstract supertype. A geometry element may have an identifying attribute ("gml:id"), a name (attribute "name") and a description (attribute "description"). It may be associated with a spatial reference system (attribute "srsName"). The following rules shall be adhered: - Every geometry type shall derive from this abstract type. - Every geometry element (i.e. an element of a geometry type) shall be directly or indirectly in the substitution group of _Geometry.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGMLType">
				<attributeGroup ref="gml:SRSReferenceGroup"/>
			</extension>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<complexType name="AbstractGMLType" abstract="true">
		<annotation>
			<documentation>All complexContent GML elements are directly or indirectly derived from this abstract supertype 
	to establish a hierarchy of GML types that may be distinguished from other XML types by their ancestry. 
	Elements in this hierarchy may have an ID and are thus referenceable.  </documentation>
		</annotation>
		<attribute ref="gml:id" use="optional"/>
	</complexType>
	<!-- ================================================= -->
	<attribute name="id" type="ID">
		<annotation>
			<documentation>Database handle for the object.  It is of XML type “ID”, so is constrained to be unique in the XML document within which it occurs.  An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods.  This is done by concatenating the URI for the document, a fragment separator “#”, and the value of the id attribute.  </documentation>
		</annotation>
	</attribute>
	<!-- ================================================= -->
	<attributeGroup name="SRSReferenceGroup">
		<annotation>
			<documentation>Optional reference to the CRS used by this geometry, with optional additional information to simplify use when a more complete definition of the CRS is not needed. </documentation>
		</annotation>
		<attribute name="srsName" type="anyURI" use="optional">
			<annotation>
				<documentation>In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.</documentation>
			</annotation>
		</attribute>
		<attribute name="srsDimension" type="positiveInteger" use="optional">
			<annotation>
				<documentation>The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted. </documentation>
			</annotation>
		</attribute>
		<!--      <attributeGroup ref="gml:SRSInformationGroup"/>
-->
	</attributeGroup>
	<!-- ================================================= -->
	<element name="_GeometricPrimitive" type="gml:AbstractGeometricPrimitiveType" abstract="true" substitutionGroup="gml:_Geometry">
		<annotation>
			<documentation>The "_GeometricPrimitive" element is the abstract head of the substituition group for all (pre- and user-defined) geometric primitives.</documentation>
		</annotation>
	</element>
	<!-- ================================================= -->
	<element name="_Geometry" type="gml:AbstractGeometryType" abstract="true" substitutionGroup="gml:_GML">
		<annotation>
			<documentation>The "_Geometry" element is the abstract head of the substituition group for all geometry elements of GML 3. This includes pre-defined and user-defined geometry elements. Any geometry element must be a direct or indirect extension/restriction of AbstractGeometryType and must be directly or indirectly in the substitution group of "_Geometry".</documentation>
			<appinfo>
				<sch:pattern>
					<sch:rule context="gml:_Geometry">
						<sch:extends rule="CRSLabels"/>
					</sch:rule>
				</sch:pattern>
			</appinfo>
		</annotation>
	</element>
	<!-- ================================================= -->
	<element name="_GML" type="gml:AbstractGMLType" abstract="true" substitutionGroup="gml:_Object">
		<annotation>
			<documentation>Global element which acts as the head of a substitution group that may include any element which is a GML feature, object, geometry or complex value</documentation>
		</annotation>
	</element>
	<!-- ================================================= -->
	<element name="_Object" abstract="true">
		<annotation>
			<documentation>This abstract element is the head of a substitutionGroup hierararchy which may contain either simpleContent or complexContent elements.  It is used to assert the model position of "class" elements declared in other GML schemas.  </documentation>
		</annotation>
	</element>
	<!-- ================================================= -->
	<complexType name="AbstractCurveType" abstract="true">
		<annotation>
			<documentation>An abstraction of a curve to support the different levels of complexity. The curve can always be viewed as a geometric primitive, i.e. is continuous.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGeometricPrimitiveType"/>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<element name="_Curve" type="gml:AbstractCurveType" abstract="true" substitutionGroup="gml:_GeometricPrimitive">
		<annotation>
			<documentation>The "_Curve" element is the abstract head of the substituition group for all (continuous) curve elements.</documentation>
		</annotation>
	</element>
	<!-- =========================================================== -->
	<element name="_CurveSegment" type="gml:AbstractCurveSegmentType" abstract="true">
		<annotation>
			<documentation>The "_CurveSegment" element is the abstract head of the substituition group for all curve segment elements, i.e. continuous segments of the same interpolation mechanism.</documentation>
		</annotation>
	</element>
	<!-- =========================================================== -->
	<complexType name="AbstractCurveSegmentType" abstract="true">
		<annotation>
			<documentation>
				Curve segment defines a homogeneous segment of a curve.
			</documentation>
		</annotation>
	</complexType>
	<!-- ================================================= -->
	<complexType name="AbstractSurfaceType">
		<annotation>
			<documentation>
				An abstraction of a surface to support the different levels of complexity. A surface is always a continuous region of a plane.
			</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGeometricPrimitiveType"/>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<complexType name="AbstractRingPropertyType">
		<annotation>
			<documentation>
			        Encapsulates a ring to represent the surface boundary property of a surface.
			</documentation>
		</annotation>
		<sequence>
			<element ref="gml:_Ring"/>
		</sequence>
	</complexType>
	<!-- ================================================= -->
	<element name="_Ring" type="gml:AbstractRingType" abstract="true" substitutionGroup="gml:_Geometry">
		<annotation>
			<documentation>The "_Ring" element is the abstract head of the substituition group for all closed boundaries of a surface patch.</documentation>
		</annotation>
	</element>
	<!-- ================================================= -->
	<complexType name="AbstractRingType" abstract="true">
		<annotation>
			<documentation>
				An abstraction of a ring to support surface boundaries of different complexity.
			</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGeometryType"/>
		</complexContent>
	</complexType>
	<!-- ================================================= -->
	<!--   <element name="interior" type="gml:AbstractRingPropertyType">
		
      <annotation>
			
         <documentation>A boundary of a surface consists of a number of rings. The "interior" rings seperate the surface / surface patch from the area enclosed by the rings.</documentation>
		
      </annotation>
	
   </element>
-->
	<!-- ================================================= -->
	<element name="_Surface" type="gml:AbstractSurfaceType" abstract="true" substitutionGroup="gml:_GeometricPrimitive">
		<annotation>
			<documentation>The "_Surface" element is the abstract head of the substituition group for all (continuous) surface elements.</documentation>
		</annotation>
	</element>
	<!-- =========================================================== -->
	<!-- The following elements are not used in GeoRSS, but allow GML application schemas to be developed from the GeoRSS GML profile. -->
	<!--  Josh Lieberman 6/07 -->
	<!-- =========================================================== -->
	<element name="_Feature" type="gml:AbstractFeatureType" abstract="true" substitutionGroup="gml:_GML"/>
	<!-- =========================================================== -->
	<complexType name="AbstractFeatureType" abstract="true">
		<annotation>
			<documentation> An abstract feature provides a set of common properties, including id, metaDataProperty, name and description inherited from AbstractGMLType, plus boundedBy.    A concrete feature type must derive from this type and specify additional  properties in an application schema. A feature must possess an identifying attribute ('id' - 'fid' has been deprecated).  </documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractGMLType">
				<sequence>
					<element ref="gml:boundedBy" minOccurs="0"/>
					<!-- additional properties must be specified in an application schema -->
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- ============================================================== -->
	<!-- =========================================================== -->
	<element name="boundedBy" type="gml:BoundingShapeType"/>
	<!-- ====================================================================== -->
	<complexType name="BoundingShapeType">
		<annotation>
			<documentation>Bounding shape.</documentation>
		</annotation>
		<sequence>
			<choice>
				<element ref="gml:Envelope"/>
			</choice>
		</sequence>
	</complexType>
	<!-- ====================================================================== -->
	<!-- ===== property for feature association ==== -->
	<element name="featureMember" type="gml:FeaturePropertyType"/>
	<element name="featureProperty" type="gml:FeaturePropertyType"/>
	<!-- ============================================================== -->
	<complexType name="FeaturePropertyType">
		<annotation>
			<documentation>Container for a feature - follow gml:AssociationType pattern.</documentation>
		</annotation>
		<sequence>
			<element ref="gml:_Feature" minOccurs="0"/>
		</sequence>
		<!--		<attributeGroup ref="gml:AssociationAttributeGroup"/> -->
	</complexType>
	<!-- =========================================================== -->
	<element name="_FeatureCollection" type="gml:AbstractFeatureCollectionType" abstract="true" substitutionGroup="gml:_Feature"/>
	<!-- ===========================================================   -->
	<complexType name="AbstractFeatureCollectionType" abstract="true">
		<annotation>
			<documentation> A feature collection contains zero or more features.  </documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractFeatureType">
				<sequence>
					<element ref="gml:featureMember" minOccurs="0" maxOccurs="unbounded"/>
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- =========================================================== -->
	<element name="FeatureCollection" type="gml:FeatureCollectionType" substitutionGroup="gml:_Feature"/>
	<!-- =========================================================== -->
	<complexType name="FeatureCollectionType">
		<annotation>
			<documentation> Concrete generic feature collection.  </documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractFeatureCollectionType"/>
		</complexContent>
	</complexType>
	<!-- ============================================================== -->
</schema>