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<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="urn:ietf:params:xml:ns:dialog-info" targetNamespace="urn:ietf:params:xml:ns:dialog-info" elementFormDefault="qualified" attributeFormDefault="unqualified">
<!-- This import brings in the XML language attribute xml:lang-->
<xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
<xs:element name="dialog-info">
<xs:complexType>
<xs:sequence>
<xs:element ref="tns:dialog" minOccurs="0" maxOccurs="unbounded"/>
<xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="version" type="xs:nonNegativeInteger" use="required"/>
<xs:attribute name="state" use="required">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="full"/>
<xs:enumeration value="partial"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="entity" type="xs:anyURI" use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="dialog">
<xs:complexType>
<xs:sequence>
<xs:element ref="tns:state" minOccurs="1" maxOccurs="1"/>
<xs:element name="duration" type="xs:nonNegativeInteger" minOccurs="0" maxOccurs="1"/>
<xs:element name="replaces" minOccurs="0" maxOccurs="1">
<xs:complexType>
<xs:attribute name="call-id" type="xs:string" use="required"/>
<xs:attribute name="local-tag" type="xs:string" use="required"/>
<xs:attribute name="remote-tag" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="referred-by" type="tns:nameaddr" minOccurs="0" maxOccurs="1"/>
<xs:element name="route-set" minOccurs="0" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="hop" type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="local" type="tns:participant" minOccurs="0" maxOccurs="1"/>
<xs:element name="remote" type="tns:participant" minOccurs="0" maxOccurs="1"/>
<xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="id" type="xs:string" use="required"/>
<xs:attribute name="call-id" type="xs:string" use="optional"/>
<xs:attribute name="local-tag" type="xs:string" use="optional"/>
<xs:attribute name="remote-tag" type="xs:string" use="optional"/>
<xs:attribute name="direction" use="optional">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="initiator"/>
<xs:enumeration value="recipient"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:complexType name="participant">
<xs:sequence>
<xs:element name="identity" type="tns:nameaddr" minOccurs="0" maxOccurs="1"/>
<xs:element name="target" minOccurs="0" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="param" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:attribute name="pname" type="xs:string" use="required"/>
<xs:attribute name="pval" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="uri" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="session-description" type="tns:sessd" minOccurs="0" maxOccurs="1"/>
<xs:element name="cseq" type="xs:nonNegativeInteger" minOccurs="0" maxOccurs="1"/>
<xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="nameaddr">
<xs:simpleContent>
<xs:extension base="xs:anyURI">
<xs:attribute name="display-name" type="xs:string" use="optional"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:complexType name="sessd">
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="type" type="xs:string" use="required"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:element name="state">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="event" use="optional">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="cancelled"/>
<xs:enumeration value="rejected"/>
<xs:enumeration value="replaced"/>
<xs:enumeration value="local-bye"/>
<xs:enumeration value="remote-bye"/>
<xs:enumeration value="error"/>
<xs:enumeration value="timeout"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="code" use="optional">
<xs:simpleType>
<xs:restriction base="xs:positiveInteger">
<xs:minInclusive value="100"/>
<xs:maxInclusive value="699"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:schema>
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