<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.gpxsee.org/map/1"
  xmlns="http://www.gpxsee.org/map/1"
  elementFormDefault="qualified">

	<xs:simpleType name="mapType">
		<xs:restriction base="xs:string">
			<xs:enumeration value="OSM"/>
			<xs:enumeration value="WMTS"/>
			<xs:enumeration value="WMS"/>
		</xs:restriction>
	</xs:simpleType>

	<xs:simpleType name="urlType">
		<xs:restriction base="xs:string">
			<xs:enumeration value="REST"/>
			<xs:enumeration value="KVP"/>
		</xs:restriction>
	</xs:simpleType>

	<xs:simpleType name="axisOrder">
		<xs:restriction base="xs:string">
			<xs:enumeration value="xy"/>
			<xs:enumeration value="yx"/>
		</xs:restriction>
	</xs:simpleType>

	<xs:element name="map">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="name" type="xs:string" minOccurs="1" maxOccurs="1"/>
				<xs:element name="url" minOccurs="1" maxOccurs="1">
					<xs:complexType mixed="true">
						<xs:simpleContent>
							<xs:extension base="xs:string">
								<xs:attribute name="type" type="urlType"/>
							</xs:extension>
						</xs:simpleContent>
					</xs:complexType>
				</xs:element>
				<xs:element name="copyright" type="xs:string" minOccurs="0" maxOccurs="1"/>
				<xs:element name="zoom" minOccurs="0" maxOccurs="1">
					<xs:complexType>
						<xs:attribute name="min" type="xs:nonNegativeInteger"/>
						<xs:attribute name="max" type="xs:nonNegativeInteger"/>
					</xs:complexType>
				</xs:element>
				<xs:element name="bounds" minOccurs="0" maxOccurs="1">
					<xs:complexType>
						<xs:attribute name="top" type="xs:decimal"/>
						<xs:attribute name="bottom" type="xs:decimal"/>
						<xs:attribute name="left" type="xs:decimal"/>
						<xs:attribute name="right" type="xs:decimal"/>
					</xs:complexType>
				</xs:element>
				<xs:element name="format" type="xs:string" minOccurs="0" maxOccurs="1"/>
				<xs:element name="layer" type="xs:string" minOccurs="0" maxOccurs="1"/>
				<xs:element name="style" type="xs:string" minOccurs="0" maxOccurs="1"/>
				<xs:element name="crs" minOccurs="0" maxOccurs="1">
					<xs:complexType mixed="true">
						<xs:simpleContent>
							<xs:extension base="xs:string">
								<xs:attribute name="axis" type="axisOrder"/>
							</xs:extension>
						</xs:simpleContent>
					</xs:complexType>
				</xs:element>
				<xs:element name="set" minOccurs="0" maxOccurs="1">
					<xs:complexType mixed="true">
						<xs:simpleContent>
							<xs:extension base="xs:string">
								<xs:attribute name="axis" type="axisOrder"/>
							</xs:extension>
						</xs:simpleContent>
					</xs:complexType>
				</xs:element>
				<xs:element name="dimension" minOccurs="0" maxOccurs="unbounded">
					<xs:complexType mixed="true">
						<xs:simpleContent>
							<xs:extension base="xs:string">
								<xs:attribute name="id" type="xs:string" use="required"/>
							</xs:extension>
						</xs:simpleContent>
					</xs:complexType>
				</xs:element>
				<xs:element name="authorization" minOccurs="0" maxOccurs="1">
					<xs:complexType>
						<xs:attribute name="username" type="xs:string" use="required"/>
						<xs:attribute name="password" type="xs:string" use="required"/>
					</xs:complexType>
				</xs:element>
			</xs:sequence>

			<xs:attribute name="type" type="mapType" use="optional"/>
		</xs:complexType>
	</xs:element>

</xs:schema>