Appendix A: The Geometry Schema, V2.06 (Normative)

 <?xml version="1.0" encoding="UTF-8"?> <!--  File: geometry.xsd  --> <schema targetNamespace="http://www.opengis.net/gml"         xmlns="http://www.w3.org/2000/10/XMLSchema"         xmlns:gml="http://www.opengis.net/gml"         xmlns:xlink="http://www.w3.org/1999/xlink"         elementFormDefault="qualified"         version="2.06">   <annotation>     <appinfo>geometry.xsd v2.06 2001-02</appinfo>     <documentation xml:lang="en">       GML Geometry schema. Copyright (c) 2001 OGC, All Rights Reserved.     </documentation>   </annotation>   <!-- bring in the XLink attributes -->   <import namespace="http://www.w3.org/1999/xlink"     schemaLocation="xlinks.xsd"/>   <!-- ==============================================================        global declarations   =============================================================== -->   <element name="_Geometry" type="gml:AbstractGeometryType"     abstract="true"/>   <element name="_GeometryCollection" type="gml:GeometryCollectionType"     abstract="true"/>   <element name="geometryMember" type="gml:GeometryAssociationType"/>   <!-- primitive geometry elements -->   <element name="Point" type="gml:PointType" substitutionGroup=     "gml:_Geometry"/>   <element name="LineString" type="gml:LineStringType"     substitutionGroup="gml:_Geometry"/>   <element name="LinearRing" type="gml:LinearRingType"     substitutionGroup="gml:_Geometry"/>   <element name="Polygon" type="gml:PolygonType"     substitutionGroup="gml:_Geometry"/>   <element name="Box" type="gml:BoxType"/>   <!-- aggregate geometry elements -->   <element name="MultiGeometry" type="gml:GeometryCollectionType"/>   <element name="MultiPoint" type="gml:MultiPointType"     substitutionGroup="gml:_Geometry"/>   <element name="MultiLineString" type="gml:MultiLineStringType"     substitutionGroup="gml:_Geometry"/>   <element name="MultiPolygon" type="gml:MultiPolygonType"     substitutionGroup="gml:_Geometry"/>   <!-- coordinate elements -->   <element name="coord" type="gml:CoordType"/>   <element name="coordinates" type="gml:CoordinatesType"/>   <!-- this attribute gives the location where an element is defined -->   <attribute name="remoteSchema" type="uriReference" />   <!-- ==============================================================        abstract supertypes   =============================================================== -->   <complexType name="AbstractGeometryType" abstract="true">     <annotation>       <documentation>         All geometry elements are derived from this abstract supertype;         a geometry element may have an identifying attribute ('gid').         It may be associated with a spatial reference system.       </documentation>     </annotation>     <attribute name="gid" type="ID" use="optional"/>     <attribute name="srsName" type="uriReference" use="optional"/>   </complexType>   <complexType name="AbstractGeometryCollectionBaseType"     abstract="true">     <annotation>       <documentation>         This abstract base type for geometry collections just makes the         srsName attribute mandatory.       </documentation>     </annotation>     <complexContent>       <restriction base="gml:AbstractGeometryType">         <attribute name="gid" type="ID" use="optional"/>         <attribute name="srsName" type="uriReference" use="required"/>       </restriction>     </complexContent>   </complexType>   <attributeGroup name="AssociationAttributeGroup">     <annotation>       <documentation>         These attributes can be attached to any element, thus allowing         it to act as a pointer. The 'remoteSchema' attribute allows         an element that carries link attributes to indicate that the         element is declared in a remote schema rather than by the         schema that constrains the current document instance.       </documentation>     </annotation>     <attributeGroup ref="xlink:simpleLink"/>     <attribute ref="gml:remoteSchema" use="optional"/>   </attributeGroup>   <complexType name="GeometryAssociationType">     <annotation>       <documentation>         An instance of this type (e.g. a geometryMember) can either         enclose or point to a primitive geometry element. When serving         as a simple link that references a remote geometry instance,         the value of the gml:remoteSchema attribute can be used to         locate a schema fragment that constrains the target instance.       </documentation>     </annotation>     <sequence>       <element ref="gml:_Geometry" minOccurs="0"/>     </sequence>     <attributeGroup ref="gml:AssociationAttributeGroup"/>   </complexType>   <!-- ==============================================================        primitive geometry types   =============================================================== -->   <complexType name="PointType">     <annotation>       <documentation>         A Point is defined by a single coordinate tuple.       </documentation>     </annotation>     <complexContent>       <extension base="gml:AbstractGeometryType">         <sequence>           <choice>             <element ref="gml:coord"/>             <element ref="gml:coordinates"/>           </choice>         </sequence>       </extension>     </complexContent>   </complexType>   <complexType name="LineStringType">     <annotation>       <documentation>         A LineString is defined by two or more coordinate tuples, with         linear interpolation between them.       </documentation>     </annotation>     <complexContent>       <extension base="gml:AbstractGeometryType">         <sequence>           <choice>             <element ref="gml:coord" minOccurs="2" maxOccurs=               "unbounded"/>             <element ref="gml:coordinates"/>           </choice>         </sequence>       </extension>     </complexContent>   </complexType>   <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:AbstractGeometryType">         <sequence>           <choice>             <element ref="gml:coord" minOccurs="4" maxOccurs=               "unbounded"/>             <element ref="gml:coordinates"/>           </choice>         </sequence>       </extension>     </complexContent>   </complexType>   <complexType name="BoxType">     <annotation>       <documentation>         The Box structure defines an extent using a pair of         coordinate tuples.       </documentation>     </annotation>     <complexContent>       <extension base="gml:AbstractGeometryType">         <sequence>           <choice>             <element ref="gml:coord" minOccurs="2" maxOccurs="2"/>             <element ref="gml:coordinates"/>           </choice>         </sequence>       </extension>     </complexContent>   </complexType>   <complexType name="PolygonType">     <annotation>       <documentation>         A Polygon is defined by an outer boundary and zero or more         inner boundaries which are in turn defined by LinearRings.       </documentation>     </annotation>     <complexContent>       <extension base="gml:AbstractGeometryType">         <sequence>           <element name="outerBoundaryIs">             <complexType>               <sequence>                 <element ref="gml:LinearRing"/>               </sequence>             </complexType>           </element>           <element name="innerBoundaryIs" minOccurs="0" maxOccurs=             "unbounded">             <complexType>               <sequence>                 <element ref="gml:LinearRing"/>               </sequence>             </complexType>           </element>         </sequence>       </extension>     </complexContent>   </complexType> <!-- ==============================================================      aggregate geometry types ================================================================== -->   <complexType name="GeometryCollectionType">     <annotation>       <documentation>         A geometry collection must include one or more geometries,         referenced through geometryMember elements. User-defined         geometry collections that accept GML geometry classes as         members must instantiate--or derive from--this type.       </documentation>     </annotation>     <complexContent>       <extension base="gml:AbstractGeometryCollectionBaseType">         <sequence>           <element ref="gml:geometryMember" maxOccurs="unbounded"/>         </sequence>       </extension>     </complexContent>   </complexType>   <complexType name="MultiPointType">     <annotation>       <documentation>         A MultiPoint is defined by one or more Points, referenced         through pointMember elements.       </documentation>     </annotation>     <complexContent>       <restriction base="gml:GeometryCollectionType">         <sequence>           <element name="pointMember" maxOccurs="unbounded">             <complexType>               <sequence>                 <element ref="gml:Point"/>               </sequence>             </complexType>           </element>         </sequence>       </restriction>     </complexContent>   </complexType>   <complexType name="MultiLineStringType">     <annotation>       <documentation>         A MultiLineString is defined by one or more LineStrings,         referenced through lineStringMember elements.       </documentation>     </annotation>     <complexContent>       <restriction base="gml:GeometryCollectionType">         <sequence>           <element name="lineStringMember" maxOccurs="unbounded">             <complexType>               <sequence>                 <element ref="gml:LineString"/>               </sequence>             </complexType>           </element>         </sequence>       </restriction>     </complexContent>   </complexType>   <complexType name="MultiPolygonType">     <annotation>       <documentation>         A MultiPolygon is defined by one or more Polygons, referenced         through polygonMember elements.       </documentation>     </annotation>     <complexContent>       <restriction base="gml:GeometryCollectionType">         <sequence>           <element name="polygonMember" maxOccurs="unbounded">             <complexType>               <sequence>                 <element ref="gml:Polygon"/>               </sequence>             </complexType>           </element>         </sequence>       </restriction>     </complexContent>   </complexType>   <!-- ==============================================================        There are two ways to represent coordinates: (1) as a sequence        of <coord> elements that encapsulate tuples, or (2) using a        single <coordinates> string.   =============================================================== -->   <complexType name="CoordType">     <annotation>       <documentation>         Represents a coordinate tuple in one, two, or three dimensions.       </documentation>     </annotation>     <sequence>       <element name="X" type="decimal"/>       <element name="Y" type="decimal" minOccurs="0"/>       <element name="Z" type="decimal" minOccurs="0"/>     </sequence>   </complexType>   <complexType name="CoordinatesType">     <annotation>       <documentation>         Coordinates can be included in a single string, but there is no         facility for validating string content. The value of the 'cs'         attribute is the separator for coordinate values, and the value         of the 'ts' attribute gives the tuple separator (a single space         by default); the default values may be changed to reflect local         usage.       </documentation>     </annotation>     <simpleContent>       <extension base="string">         <attribute name="decimal" type="string" use="default"           value="."/>         <attribute name="cs" type="string" use="default" value=","/>         <attribute name="ts" type="string" use="default"           value="&#x20;"/>       </extension>     </simpleContent>   </complexType> </schema> 


Mobile Location Servies(c) The Definitive Guide
Software Project Management in Practice
ISBN: 0201737213
EAN: 2147483647
Year: 2005
Pages: 150
Authors: Pankaj Jalote

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