--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+/******************************************************************************
+ * $Id: ogrvrt.xsd 34203 2016-05-10 14:06:35Z rouault $
+ *
+ * Project: GDAL/OGR
+ * Purpose: XML Schema for OGR VRT files.
+ * Author: Even Rouault, <even dot rouault at mines dash paris dot org>
+ *
+ **********************************************************************
+ * Copyright (c) 2012, Even Rouault
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ ****************************************************************************/
+-->
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" version="1.0">
+ <xs:element name="OGRVRTDataSource">
+ <xs:complexType>
+ <xs:sequence>
+ <xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element name="Metadata" type="MetadataType"/> <!-- may be repeated -->
+ <xs:element name="OGRVRTLayer" type="OGRVRTLayerType"/>
+ <xs:element name="OGRVRTWarpedLayer" type="OGRVRTWarpedLayerType"/>
+ <xs:element name="OGRVRTUnionLayer" type="OGRVRTUnionLayerType"/>
+ </xs:choice>
+ </xs:sequence>
+ </xs:complexType>
+ </xs:element>
+
+ <xs:complexType name="MetadataType">
+ <xs:sequence>
+ <!--<xs:choice>-->
+ <!--<xs:element name="MDI" type="MDIType" minOccurs="0" maxOccurs="unbounded"/>-->
+ <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
+ <!--</xs:choice>-->
+ </xs:sequence>
+ <xs:attribute name="domain" type="xs:string"/>
+ <xs:attribute name="format" type="xs:string"/>
+ </xs:complexType>
+
+ <xs:complexType name="OGRVRTLayerType">
+ <xs:sequence>
+ <xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element name="Metadata" type="MetadataType"/> <!-- may be repeated -->
+ <xs:element name="SrcDataSource" type="SrcDataSourceType">
+ <xs:annotation>
+ <xs:documentation>Required element</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="OpenOptions" type="OpenOptionsType">
+ <xs:annotation>
+ <xs:documentation>Optional element</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="SrcLayer" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>SrcLayer or(eclusive) SrcSQL are required elements</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="SrcSQL">
+ <xs:complexType>
+ <xs:simpleContent>
+ <xs:extension base="nonEmptyStringType">
+ <xs:attribute name="dialect" type="nonEmptyStringType"/>
+ </xs:extension>
+ </xs:simpleContent>
+ </xs:complexType>
+ </xs:element>
+ <xs:element name="FID" type="FIDType"/>
+ <xs:element name="Style" type="nonEmptyStringType"/>
+ <xs:element name="GeometryType" type="GeometryTypeType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.GeometryType for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="LayerSRS" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.SRS for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="Field" type="FieldType">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="GeometryField" type="GeometryFieldType">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="SrcRegion" type="SrcRegionType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.SrcRegion for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="attrFilterPassThrough" type="OGRBooleanType">
+ <xs:annotation>
+ <xs:documentation>Default to FALSE.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="FeatureCount" type="xs:integer"/>
+ <xs:group ref="ExtentType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.ExtentXMin, etc... for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:group>
+ </xs:choice>
+ </xs:sequence>
+ <xs:attribute name="name" type="nonEmptyStringType" use="required"/>
+ </xs:complexType>
+
+ <xs:complexType name="OpenOptionsType">
+ <xs:sequence>
+ <xs:element name="OOI" type="OOIType" minOccurs="0" maxOccurs="unbounded"/>
+ </xs:sequence>
+ </xs:complexType>
+
+ <xs:complexType name="OOIType">
+ <xs:simpleContent>
+ <xs:extension base="nonEmptyStringType">
+ <xs:attribute name="key" type="xs:string"/>
+ </xs:extension>
+ </xs:simpleContent>
+ </xs:complexType>
+
+ <xs:complexType name="FIDType">
+ <xs:simpleContent>
+ <xs:extension base="nonEmptyStringType">
+ <xs:attribute name="name" type="xs:string">
+ <xs:annotation>
+ <xs:documentation>A user-facing name can be specified here so that a FID column name is reported even if it is not reported as a regular field.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ </xs:extension>
+ </xs:simpleContent>
+ </xs:complexType>
+
+ <xs:group name="ExtentType">
+ <xs:sequence>
+ <xs:element name="ExtentXMin" type="xs:double" minOccurs="1" maxOccurs="1"/>
+ <xs:element name="ExtentYMin" type="xs:double" minOccurs="1" maxOccurs="1"/>
+ <xs:element name="ExtentXMax" type="xs:double" minOccurs="1" maxOccurs="1"/>
+ <xs:element name="ExtentYMax" type="xs:double" minOccurs="1" maxOccurs="1"/>
+ </xs:sequence>
+ </xs:group>
+
+ <xs:complexType name="SrcDataSourceType">
+ <xs:simpleContent>
+ <xs:extension base="nonEmptyStringType">
+ <xs:attribute name="relativeToVRT" type="OGRBooleanType" default="FALSE">
+ <xs:annotation>
+ <xs:documentation>Default to FALSE.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <!-- alternate case -->
+ <xs:attribute name="relativetoVRT" type="OGRBooleanType" default="FALSE">
+ <xs:annotation>
+ <xs:documentation>Default to FALSE.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="shared" type="OGRBooleanType"/>
+ </xs:extension>
+ </xs:simpleContent>
+ </xs:complexType>
+
+ <xs:simpleType name="nonEmptyStringType">
+ <xs:restriction base="xs:string">
+ <xs:minLength value="1"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:simpleType name="GeometryTypeType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="wkbNone"/>
+ <xs:enumeration value="wkbUnknown"/>
+ <xs:enumeration value="wkbPoint"/>
+ <xs:enumeration value="wkbLineString"/>
+ <xs:enumeration value="wkbPolygon"/>
+ <xs:enumeration value="wkbMultiPoint"/>
+ <xs:enumeration value="wkbMultiLineString"/>
+ <xs:enumeration value="wkbMultiPolygon"/>
+ <xs:enumeration value="wkbGeometryCollection"/>
+ <xs:enumeration value="wkbCircularString"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCompoundCurve"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCurvePolygon"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbMultiCurve"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbMultiSurface"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCurve"/> <!-- new in GDAL 2.1 -->
+ <xs:enumeration value="wkbSurface"/> <!-- new in GDAL 2.1 -->
+ <xs:enumeration value="wkbPoint25D"/>
+ <xs:enumeration value="wkbLineString25D"/>
+ <xs:enumeration value="wkbPolygon25D"/>
+ <xs:enumeration value="wkbMultiPoint25D"/>
+ <xs:enumeration value="wkbMultiLineString25D"/>
+ <xs:enumeration value="wkbMultiPolygon25D"/>
+ <xs:enumeration value="wkbGeometryCollection25D"/>
+ <xs:enumeration value="wkbCircularStringZ"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCompoundCurveZ"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCurvePolygonZ"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbMultiCurveZ"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbMultiSurfaceZ"/> <!-- new in GDAL 2.0 -->
+ <xs:enumeration value="wkbCurveZ"/> <!-- new in GDAL 2.1 -->
+ <xs:enumeration value="wkbSurfaceZ"/> <!-- new in GDAL 2.1 -->
+
+ <!-- below is new in GDAL 2.1 -->
+ <xs:enumeration value="wkbPointM"/>
+ <xs:enumeration value="wkbLineStringM"/>
+ <xs:enumeration value="wkbPolygonM"/>
+ <xs:enumeration value="wkbMultiPointM"/>
+ <xs:enumeration value="wkbMultiLineStringM"/>
+ <xs:enumeration value="wkbMultiPolygonM"/>
+ <xs:enumeration value="wkbGeometryCollectionM"/>
+ <xs:enumeration value="wkbCircularStringM"/>
+ <xs:enumeration value="wkbCompoundCurveM"/>
+ <xs:enumeration value="wkbCurvePolygonM"/>
+ <xs:enumeration value="wkbMultiCurveM"/>
+ <xs:enumeration value="wkbMultiSurfaceM"/>
+ <xs:enumeration value="wkbCurveM"/>
+ <xs:enumeration value="wkbSurfaceM"/>
+
+ <xs:enumeration value="wkbPointZM"/>
+ <xs:enumeration value="wkbLineStringZM"/>
+ <xs:enumeration value="wkbPolygonZM"/>
+ <xs:enumeration value="wkbMultiPointZM"/>
+ <xs:enumeration value="wkbMultiLineStringZM"/>
+ <xs:enumeration value="wkbMultiPolygonZM"/>
+ <xs:enumeration value="wkbGeometryCollectionZM"/>
+ <xs:enumeration value="wkbCircularStringZM"/>
+ <xs:enumeration value="wkbCompoundCurveZM"/>
+ <xs:enumeration value="wkbCurvePolygonZM"/>
+ <xs:enumeration value="wkbMultiCurveZM"/>
+ <xs:enumeration value="wkbMultiSurfaceZM"/>
+ <xs:enumeration value="wkbCurveZM"/>
+ <xs:enumeration value="wkbSurfaceZM"/>
+
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:complexType name="FieldTypeWithoutSrc">
+ <xs:attribute name="name" type="nonEmptyStringType" use="required"/>
+ <xs:attribute name="type" type="OGRFieldTypeType" default="String"/>
+ <xs:attribute name="subtype" type="OGRFieldSubTypeType" default="None"/> <!-- new in GDAL 2.0 -->
+ <xs:attribute name="width" type="xs:nonNegativeInteger"/>
+ <xs:attribute name="precision" type="xs:nonNegativeInteger"/>
+ <xs:attribute name="nullable" type="OGRBooleanType" default="true"/> <!-- new in GDAL 2.0 -->
+ <xs:attribute name="default" type="xs:string"/> <!-- new in GDAL 2.0 -->
+ </xs:complexType>
+
+ <xs:complexType name="FieldType">
+ <xs:complexContent>
+ <xs:extension base="FieldTypeWithoutSrc">
+ <xs:attribute name="src" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Defaults to the value of "name" if not specified.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ </xs:extension>
+ </xs:complexContent>
+ </xs:complexType>
+
+ <xs:simpleType name="OGRFieldTypeType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="Integer"/>
+ <xs:enumeration value="integer"/>
+ <xs:enumeration value="Integer64"/>
+ <xs:enumeration value="integer64"/>
+ <xs:enumeration value="Real"/>
+ <xs:enumeration value="real"/>
+ <xs:enumeration value="String"/>
+ <xs:enumeration value="string"/>
+ <xs:enumeration value="IntegerList"/>
+ <xs:enumeration value="integerlist"/>
+ <xs:enumeration value="Integer64List"/>
+ <xs:enumeration value="integer64list"/>
+ <xs:enumeration value="RealList"/>
+ <xs:enumeration value="reallist"/>
+ <xs:enumeration value="StringList"/>
+ <xs:enumeration value="stringlist"/>
+ <xs:enumeration value="Binary"/>
+ <xs:enumeration value="binary"/>
+ <xs:enumeration value="Date"/>
+ <xs:enumeration value="date"/>
+ <xs:enumeration value="Time"/>
+ <xs:enumeration value="time"/>
+ <xs:enumeration value="DateTime"/>
+ <xs:enumeration value="datetime"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:simpleType name="OGRFieldSubTypeType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="None"/>
+ <xs:enumeration value="Boolean"/>
+ <xs:enumeration value="Int16"/>
+ <xs:enumeration value="Float32"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:simpleType name="EncodingType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="Direct"/>
+ <xs:enumeration value="None"/>
+ <xs:enumeration value="WKT"/>
+ <xs:enumeration value="WKB"/>
+ <xs:enumeration value="Shape"/>
+ <xs:enumeration value="shape"/>
+ <xs:enumeration value="PointFromColumns"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:attributeGroup name="GeometryFieldTypeAttrGroupWithoutSrc">
+ <xs:attribute name="encoding" type="EncodingType">
+ <xs:annotation>
+ <xs:documentation>Defaults to Direct.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="name" type="xs:string">
+ <xs:annotation>
+ <xs:documentation>Name of the geometry field</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="x" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Only used if encoding = "PointFromColumns"</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="y" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Only used if encoding = "PointFromColumns"</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="z" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Only used if encoding = "PointFromColumns"</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="m" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Only used if encoding = "PointFromColumns"</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="useSpatialSubquery" type="OGRBooleanType">
+ <xs:annotation>
+ <xs:documentation>Only used if encoding = "PointFromColumns". Defaults to TRUE.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="reportSrcColumn" type="OGRBooleanType">
+ <xs:annotation>
+ <xs:documentation>Only used if no Field element is found at the OGRVRTLayer level</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="nullable" type="OGRBooleanType" default="true"/> <!-- new in GDAL 2.0 -->
+ </xs:attributeGroup>
+
+ <xs:complexType name="GeometryFieldTypeWithoutSrc">
+ <xs:sequence>
+ <xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element name="GeometryType" type="GeometryTypeType"/>
+ <xs:element name="SrcRegion" type="SrcRegionType"/>
+ <xs:element name="SRS" type="nonEmptyStringType"/>
+ <xs:group ref="ExtentType"/>
+ </xs:choice>
+ </xs:sequence>
+ <xs:attributeGroup ref="GeometryFieldTypeAttrGroupWithoutSrc"/>
+ </xs:complexType>
+
+ <xs:complexType name="GeometryFieldType">
+ <xs:complexContent>
+ <xs:extension base="GeometryFieldTypeWithoutSrc">
+ <xs:attribute name="field" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Used if encoding = "WKT", "WKB" or "Shape" to find
+ the attribute field of the source layer.
+ Used also in multiple geometry fields scenario to retrieve the
+ source geometry field matching the target VRT geometry field.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ </xs:extension>
+ </xs:complexContent>
+ </xs:complexType>
+
+ <xs:complexType name="SrcRegionType">
+ <xs:simpleContent>
+ <xs:extension base="PolygonWKTType">
+ <xs:attribute name="clip" type="OGRBooleanType">
+ <xs:annotation>
+ <xs:documentation>Defaults to FALSE.</xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ </xs:extension>
+ </xs:simpleContent>
+ </xs:complexType>
+
+ <xs:simpleType name="PolygonWKTType">
+ <xs:annotation>
+ <xs:documentation>A valid WKT for a POLYGON</xs:documentation>
+ </xs:annotation>
+ <xs:restriction base="xs:string">
+ <xs:pattern value="POLYGON.*"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:simpleType name="OGRBooleanType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="1"/>
+ <xs:enumeration value="0"/>
+ <xs:enumeration value="ON"/>
+ <xs:enumeration value="OFF"/>
+ <xs:enumeration value="on"/>
+ <xs:enumeration value="off"/>
+ <xs:enumeration value="YES"/>
+ <xs:enumeration value="NO"/>
+ <xs:enumeration value="yes"/>
+ <xs:enumeration value="no"/>
+ <xs:enumeration value="TRUE"/>
+ <xs:enumeration value="FALSE"/>
+ <xs:enumeration value="true"/>
+ <xs:enumeration value="false"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:complexType name="OGRVRTWarpedLayerType">
+ <xs:sequence>
+ <xs:choice minOccurs="1" maxOccurs="1">
+ <xs:element name="OGRVRTLayer" type="OGRVRTLayerType"/>
+ <xs:element name="OGRVRTWarpedLayer" type="OGRVRTWarpedLayerType"/>
+ <xs:element name="OGRVRTUnionLayer" type="OGRVRTUnionLayerType"/>
+ </xs:choice>
+ <xs:element name="WarpedGeomFieldName" type="nonEmptyStringType" minOccurs="0" maxOccurs="1"/>
+ <xs:element name="SrcSRS" type="nonEmptyStringType" minOccurs="0" maxOccurs="1"/>
+ <xs:element name="TargetSRS" type="nonEmptyStringType" minOccurs="1" maxOccurs="1"/>
+ <xs:group ref="ExtentType" minOccurs="0" maxOccurs="1"/>
+ </xs:sequence>
+ </xs:complexType>
+
+ <xs:complexType name="OGRVRTUnionLayerType">
+ <xs:sequence>
+ <xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element name="OGRVRTLayer" type="OGRVRTLayerType">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="OGRVRTWarpedLayer" type="OGRVRTWarpedLayerType">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="OGRVRTUnionLayer" type="OGRVRTUnionLayerType">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+
+ <xs:element name="GeometryType" type="GeometryTypeType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.GeometryType for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="LayerSRS" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.SRS for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="FieldStrategy" type="FieldStrategyType">
+ <xs:annotation>
+ <xs:documentation>Defaults to Union if no Field or GeometryField element is speicified.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="Field" type="FieldTypeWithoutSrc">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="GeometryField" type="GeometryFieldTypeWithoutSrc">
+ <xs:annotation>
+ <xs:documentation>May be repeated</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="PreserveSrcFID" type="OGRBooleanType">
+ <xs:annotation>
+ <xs:documentation>Defaults to FALSE.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="SourceLayerFieldName" type="nonEmptyStringType">
+ <xs:annotation>
+ <xs:documentation>Name of fields in which to place the name of the source layer of each feature.</xs:documentation>
+ </xs:annotation>
+ </xs:element>
+ <xs:element name="FeatureCount" type="xs:integer"/>
+ <xs:group ref="ExtentType">
+ <xs:annotation>
+ <xs:documentation>Use GeometryField.ExtentXMin, etc. for multi-geometry field support.</xs:documentation>
+ </xs:annotation>
+ </xs:group>
+ </xs:choice>
+ </xs:sequence>
+ <xs:attribute name="name" type="nonEmptyStringType" use="required"/>
+ </xs:complexType>
+
+ <xs:simpleType name="FieldStrategyType">
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="FirstLayer"/>
+ <xs:enumeration value="Union"/>
+ <xs:enumeration value="Intersection"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+</xs:schema>
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