<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.opengis.net/ows/1.1" 
xmlns:ows="http://www.opengis.net/ows/1.1" 
xmlns:xlink="http://www.w3.org/1999/xlink" 
xmlns="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified" version="1.1.0" xml:lang="en">
	<annotation>
		<appinfo>owsCommon.xsd 2006-10-04</appinfo>
		<documentation>This XML Schema Document encodes various parameters and parameter types that can be used in OWS operation requests and responses.
		Copyright (c) 2006 Open Geospatial Consortium, Inc. All Rights Reserved. </documentation>
	</annotation>
	<!-- ==============================================================
		includes and imports
	============================================================== -->
	<import namespace="http://www.w3.org/1999/xlink" schemaLocation="../../xlink/1.0.0/xlinks.xsd"/>
	<!-- ==============================================================
		elements and types
	============================================================== -->
	<simpleType name="MimeType">
		<annotation>
			<documentation>XML encoded identifier of a standard MIME type, possibly a parameterized MIME type. </documentation>
		</annotation>
		<restriction base="string">
			<pattern value="(application|audio|image|text|video|message|multipart|model)/.+(;\s*.+=.+)*"/>
		</restriction>
	</simpleType>
	<!-- ========================================================= -->
	<simpleType name="VersionType">
		<annotation>
			<documentation>Specification version for OWS operation. The string value shall contain one x.y.z "version" value (e.g., "2.1.3"). A version number shall contain three non-negative integers separated by decimal points, in the form "x.y.z". The integers y and z shall not exceed 99. Each version shall be for the Implementation Specification (document) and the associated XML Schemas to which requested operations will conform. An Implementation Specification version normally specifies XML Schemas against which an XML encoded operation response must conform and should be validated. See Version negotiation subclause for more information. </documentation>
		</annotation>
		<restriction base="string">
			<pattern value="\d+\.\d?\d\.\d?\d"/>
		</restriction>
	</simpleType>
	<!-- ========================================================== -->
	<element name="Metadata" type="ows:MetadataType"/>
	<!-- ========================================================== -->
	<complexType name="MetadataType">
		<annotation>
			<documentation>This element either references or contains more metadata about the element that includes this element. To reference metadata stored remotely, at least the xlinks:href attribute in xlink:simpleLink shall be included. Either at least one of the attributes in xlink:simpleLink or a substitute for the AbstractMetaData element shall be included, but not both. An Implementation Specification can restrict the contents of this element to always be a reference or always contain metadata. (Informative: This element was adapted from the metaDataProperty element in GML 3.0.) </documentation>
		</annotation>
		<sequence>
			<element ref="ows:AbstractMetaData" minOccurs="0"/>
		</sequence>
		<attributeGroup ref="xlink:simpleLink">
			<annotation>
				<documentation>Reference to metadata recorded elsewhere, either external to this XML document or within it. Whenever practical, the xlink:href attribute with type anyURI should include a URL from which this metadata can be electronically retrieved. </documentation>
			</annotation>
		</attributeGroup>
		<attribute name="about" type="anyURI" use="optional">
			<annotation>
				<documentation>Optional reference to the aspect of the element which includes this "metadata" element that this metadata provides more information about. </documentation>
			</annotation>
		</attribute>
	</complexType>
	<!-- ========================================================== -->
	<element name="AbstractMetaData" abstract="true">
		<annotation>
			<documentation>Abstract element containing more metadata about the element that includes the containing "metadata" element. A specific server implementation, or an Implementation Specification, can define concrete elements in the AbstractMetaData substitution group. </documentation>
		</annotation>
	</element>
	<!-- ========================================================== -->
	<!-- ========================================================== -->
	<element name="BoundingBox" type="ows:BoundingBoxType"/>
	<!-- =========================================================== -->
	<complexType name="BoundingBoxType">
		<annotation>
			<documentation>XML encoded minimum rectangular bounding box (or region) parameter, surrounding all the associated data. </documentation>
			<documentation>This type is adapted from the EnvelopeType of GML 3.1, with modified contents and documentation for encoding a MINIMUM size box SURROUNDING all associated data. </documentation>
		</annotation>
		<sequence>
			<element name="LowerCorner" type="ows:PositionType">
				<annotation>
					<documentation>Position of the bounding box corner at which the value of each coordinate normally is the algebraic minimum within this bounding box. In some cases, this position is normally displayed at the top, such as the top left for some image coordinates. For more information, see Subclauses 10.2.5 and C.13. </documentation>
				</annotation>
			</element>
			<element name="UpperCorner" type="ows:PositionType">
				<annotation>
					<documentation>Position of the bounding box corner at which the value of each coordinate normally is the algebraic maximum within this bounding box. In some cases, this position is normally displayed at the bottom, such as the bottom right for some image coordinates. For more information, see Subclauses 10.2.5 and C.13. </documentation>
				</annotation>
			</element>
		</sequence>
		<attribute name="crs" type="anyURI" use="optional">
			<annotation>
				<documentation>Usually references the definition of a CRS, as specified in [OGC Topic 2]. Such a CRS definition can be XML encoded using the gml:CoordinateReferenceSystemType in [GML 3.1]. For well known references, it is not required that a CRS definition exist at the location the URI points to. If no anyURI value is included, the applicable CRS must be either:
a)	Specified outside the bounding box, but inside a data structure that includes this bounding box, as specified for a specific OWS use of this bounding box type.
b)	Fixed and specified in the Implementation Specification for a specific OWS use of the bounding box type. </documentation>
			</annotation>
		</attribute>
		<attribute name="dimensions" type="positiveInteger" use="optional">
			<annotation>
				<documentation>The number of dimensions in this CRS (the length of a coordinate sequence in this use of the PositionType). This number is specified by the CRS definition, but can also be specified here. </documentation>
			</annotation>
		</attribute>
	</complexType>
	<!-- =========================================================== -->
	<simpleType name="PositionType">
		<annotation>
			<documentation>Position instances hold the coordinates of a position in a coordinate reference system (CRS) referenced by the related "crs" attribute or elsewhere. For an angular coordinate axis that is physically continuous for multiple revolutions, but whose recorded values can be discontinuous, special conditions apply when the bounding box is continuous across the value discontinuity:
a)  If the bounding box is continuous clear around this angular axis, then ordinate values of minus and plus infinity shall be used.
b)  If the bounding box is continuous across the value discontinuity but is not continuous clear around this angular axis, then some non-normal value can be used if specified for a specific OWS use of the BoundingBoxType. For more information, see Subclauses 10.2.5 and C.13. </documentation>
			<documentation>This type is adapted from DirectPositionType and doubleList of GML 3.1. The adaptations include omission of all the attributes, since the needed information is included in the BoundingBoxType. </documentation>
		</annotation>
		<list itemType="double"/>
	</simpleType>
	<!-- =========================================================== -->
	<element name="WGS84BoundingBox" type="ows:WGS84BoundingBoxType" substitutionGroup="ows:BoundingBox"/>
	<!-- =========================================================== -->
	<complexType name="WGS84BoundingBoxType">
		<annotation>
			<documentation>XML encoded minimum rectangular bounding box (or region) parameter, surrounding all the associated data. This box is specialized for use with the 2D WGS 84 coordinate reference system with decimal values of longitude and latitude. </documentation>
			<documentation>This type is adapted from the general BoundingBoxType, with modified contents and documentation for use with the 2D WGS 84 coordinate reference system. </documentation>
		</annotation>
		<complexContent>
			<restriction base="ows:BoundingBoxType">
				<sequence>
					<element name="LowerCorner" type="ows:PositionType2D">
						<annotation>
							<documentation>Position of the bounding box corner at which the values of longitude and latitude normally are the algebraic minimums within this bounding box. For more information, see Subclauses 10.4.5 and C.13. </documentation>
						</annotation>
					</element>
					<element name="UpperCorner" type="ows:PositionType2D">
						<annotation>
							<documentation>Position of the bounding box corner at which the values of longitude and latitude normally are the algebraic minimums within this bounding box. For more information, see Subclauses 10.4.5 and C.13. </documentation>
						</annotation>
					</element>
				</sequence>
				<attribute name="crs" type="anyURI" use="optional" fixed="urn:ogc:def:crs:OGC:2:84">
					<annotation>
						<documentation>This attribute can be included when considered useful. When included, this attribute shall reference the 2D WGS 84 coordinate reference system with longitude before latitude and decimal values of longitude and latitude. </documentation>
					</annotation>
				</attribute>
				<attribute name="dimensions" type="positiveInteger" use="optional" fixed="2">
					<annotation>
						<documentation>The number of dimensions in this CRS (the length of a coordinate sequence in this use of the PositionType). This number is specified by the CRS definition, but can also be specified here. </documentation>
					</annotation>
				</attribute>
			</restriction>
		</complexContent>
	</complexType>
	<!-- =========================================================== -->
	<simpleType name="PositionType2D">
		<annotation>
			<documentation>Two-dimensional position instances hold the longitude and latitude coordinates of a position in the 2D WGS 84 coordinate reference system. The longitude value shall be listed first, followed by the latitude value, both in decimal degrees. Latitude values shall range from -90 to +90 degrees, and longitude values shall normally range from -180 to +180 degrees. For the longitude axis, special conditions apply when the bounding box is continuous across the +/- 180 degrees meridian longitude value discontinuity:
a)  If the bounding box is continuous clear around the Earth, then longitude values of minus and plus infinity shall be used.
b)  If the bounding box is continuous across the value discontinuity but is not continuous clear around the Earth, then some non-normal value can be used if specified for a specific OWS use of the WGS84BoundingBoxType. For more information, see Subclauses 10.4.5 and C.13. </documentation>
		</annotation>
		<restriction base="ows:PositionType">
			<length value="2"/>
		</restriction>
	</simpleType>
</schema>
