describecoverage.xsd

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		<xs:sequence>
			<xs:element ref="gml:Envelope" maxOccurs="unbounded"/>
			<xs:element ref="gml:Grid" minOccurs="0" maxOccurs="unbounded"/>
			<xs:element ref="gml:Polygon" minOccurs="0" maxOccurs="unbounded"/>
		</xs:sequence>
	</xs:complexType>
	<!-- ========================================================== -->
	<xs:element name="temporalDomain" type="TimeSequenceType">
		<xs:annotation>
			<xs:documentation>Defines the temporal domain of a coverage offering, that is, the times for which valid data are available. The times shall to be ordered from the oldest to the newest. </xs:documentation>
		</xs:annotation>
	</xs:element>
	<!-- =============================================================
		RangeSet description elements and types 	
	============================================================== -->
	<xs:element name="rangeSet">
		<xs:annotation>
			<xs:documentation>GML property containing one RangeSet GML object. </xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="RangeSet"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
	<!-- =========================================================== -->
	<xs:element name="RangeSet" type="RangeSetType" substitutionGroup="gml:_GML"/>
	<!-- =========================================================== -->
	<xs:complexType name="RangeSetType">
		<xs:annotation>
			<xs:documentation>Defines the properties (categories, measures, or values) assigned to each location in the domain. Any such property may be a scalar (numeric or text) value, such as population density, or a compound (vector or tensor) value, such as incomes by race, or radiances by wavelength. The semantic of the range set is typically an observable and is referenced by a URI. A rangeSet also has a reference system that is reffered by the URI in the refSys attribute. The refSys is either qualitative (classification) or quantitative (uom). The three attributes can be included either here and in each axisDescription. If included in both places, the values in the axisDescription over-ride those included in the RangeSet. </xs:documentation>
		</xs:annotation>
		<xs:complexContent>
			<xs:extension base="AbstractDescriptionType">
				<xs:sequence>
					<xs:element ref="axisDescription" minOccurs="0" maxOccurs="unbounded">
						<xs:annotation>
							<xs:documentation>Defines a range provided by a coverage. Multiple occurences are used for compound observations, to descibe an additional parameter (that is, an independent variable besides space and time), plus the valid values of this parameter (which GetCoverage requests can use to select subsets of a coverage offering). </xs:documentation>
						</xs:annotation>
					</xs:element>
					<xs:element name="nullValues" type="valueEnumType" minOccurs="0">
						<xs:annotation>
							<xs:documentation>Values used when valid values are not available. (The coverage encoding may specify a fixed value for null (e.g. 聯聳99999聰 or 聯N/A聰), but often the choice is up to the provider and must be communicated to the client outside of the coverage itself.) </xs:documentation>
						</xs:annotation>
					</xs:element>
				</xs:sequence>
				<xs:attribute ref="semantic" use="optional"/>
				<xs:attribute name="refSys" type="xs:anyURI" use="optional">
					<xs:annotation>
						<xs:documentation>Pointer to the reference system in which values are expressed. This attribute shall be included either here or in each AxisDescriptionType. </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="refSysLabel" type="xs:string" use="optional">
					<xs:annotation>
						<xs:documentation>Short human-readable label denoting the reference system, for human interface display. This attribute shall be included either here or in each AxisDescriptionType. </xs:documentation>
					</xs:annotation>
				</xs:attribute>
			</xs:extension>
		</xs:complexContent>
	</xs:complexType>
	<!-- ==============================================================
	elements and types for describing valid values in the DomainSet and RangeSet
	============================================================== -->
	<xs:element name="axisDescription">
		<xs:annotation>
			<xs:documentation>GML property containing one AxisDescription GML object. </xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="AxisDescription"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
	<!-- ========================================================== -->
	<xs:element name="AxisDescription" type="AxisDescriptionType" substitutionGroup="gml:_GML"/>
	<!-- ========================================================== -->
	<xs:complexType name="AxisDescriptionType">
		<xs:annotation>
			<xs:documentation>Description of a measured or observed quantity, and list of the 聯valid聰 quantity values (values for which measurements are available or 聯by which聰 aggregate values are available). The semantic is the URI of the quantity (for example observable or mathematical variable). The refSys attribute is a URI to a reference system, and the refSysLabel is the label used by client to refer the reference system. </xs:documentation>
		</xs:annotation>
		<xs:complexContent>
			<xs:extension base="AbstractDescriptionType">
				<xs:sequence>
					<xs:element name="values">
						<xs:annotation>
							<xs:documentation>The type and value constraints for the values of this axis.</xs:documentation>
						</xs:annotation>
						<xs:complexType>
							<xs:complexContent>
								<xs:extension base="valueEnumType">
									<xs:sequence>
										<xs:element name="default" type="TypedLiteralType" minOccurs="0">
											<xs:annotation>
												<xs:documentation>Ordered sequence of the parameter value(s) that the server will use for GetCoverage requests which omit a constraint on this parameter axis. (GetCoverage requests against a coverage offering whose AxisDescription has no default must specify a valid constraint for this parameter.) </xs:documentation>
											</xs:annotation>
										</xs:element>
									</xs:sequence>
								</xs:extension>
							</xs:complexContent>
						</xs:complexType>
					</xs:element>
				</xs:sequence>
				<xs:attribute ref="semantic" use="optional"/>
				<xs:attribute name="refSys" type="xs:anyURI" use="optional">
					<xs:annotation>
						<xs:documentation>Pointer to the reference system in which values are expressed. This attribute shall be included either here or in RangeSetType. </xs:documentation>
					</xs:annotation>
				</xs:attribute>
				<xs:attribute name="refSysLabel" type="xs:string" use="optional">
					<xs:annotation>
						<xs:documentation>Short human-readable label denoting the reference system, for human interface display. This attribute shall be included either here or in RangeSetType. </xs:documentation>
					</xs:annotation>
				</xs:attribute>
			</xs:extension>
		</xs:complexContent>
	</xs:complexType>
</xs:schema>