<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
	<xs:element name="DIADescriptionMessage">
		<xs:annotation>
			<xs:documentation>messages for DIA description negotiation</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:sequence>
				<xs:element name="Type">
					<xs:simpleType>
						<xs:restriction base="xs:string">
							<xs:enumeration value="DIARegistering"/>
							<xs:enumeration value="DIATransmitting"/>
							<xs:enumeration value="DIAUpdating"/>
						</xs:restriction>
					</xs:simpleType>
				</xs:element>
				<xs:element name="Msg_ID" type="xs:nonNegativeInteger"/>
				<xs:element name="SenderPeer_ID" type="xs:ID"/>
				<xs:element name="RecipientPeer_ID" type="xs:ID"/>
				<xs:element name="DIADescription" minOccurs="0">
					<xs:complexType>
						<xs:choice>
							<xs:element name="Reference" type="xs:anyURI"/>
							<xs:element name="DIADescriptionData" type="DIADescriptionType"/>
						</xs:choice>
					</xs:complexType>
				</xs:element>
				<xs:element name="Response" type="xs:boolean" minOccurs="0"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
	<xs:complexType name="DIADescriptionType">
		<xs:sequence>
			<xs:element name="UsageEnvironmentDescription" type="UEDescriptionType" minOccurs="0"/>
			<xs:element name="ResourceAdaptabilityDescription" type="RADescriptionType" minOccurs="0"/>
			<xs:element name="DigitalItemAdaptabilityDescription" type="XDIDescriptionType" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="UEDescriptionType">
		<xs:sequence>
			<xs:element name="UserCharacteristic" type="xs:anyType" minOccurs="0"/>
			<xs:element name="TerminalCapability" type="xs:anyType" minOccurs="0"/>
			<xs:element name="NetworkCharacteristic" type="xs:anyType" minOccurs="0"/>
			<xs:element name="NaturalEnvironmentCharacteristic" type="xs:anyType" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="RADescriptionType">
		<xs:sequence>
			<xs:element name="BSDLDescription" type="xs:anyType" minOccurs="0"/>
			<xs:element name="TerminalQosDescription" type="xs:anyType" minOccurs="0"/>
			<xs:element name="MetadataAdaptabilityDescription" type="xs:anyType" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="XDIDescriptionType">
		<xs:sequence>
			<xs:element name="SessionMobilityDescription" type="xs:anyType" minOccurs="0"/>
		</xs:sequence>
	</xs:complexType>
</xs:schema>
