jabber-rpc.xsd

<?xml version='1.0' encoding='UTF-8'?>

<xs:schema
    xmlns:xs='http://www.w3.org/2001/XMLSchema'
    targetNamespace='jabber:iq:rpc'
    xmlns='jabber:iq:rpc'
    elementFormDefault='qualified'>

  <xs:annotation>
    <xs:documentation>
      The protocol documented by this schema is defined in
      XEP-0009: https://xmpp.org/extensions/xep-0009.html

      There is no official XML schema for XML-RPC. The main body 
      of this schema has been borrowed from an unofficial schema 
      representation contained in the book "Processing XML With 
      Java" by Elliotte Rusty Harold, as located at:

      http://www.ibiblio.org/xml/books/xmljava/chapters/ch02s05.html
    </xs:documentation>
  </xs:annotation>

  <xs:element name='query'>
    <xs:complexType>
      <xs:choice minOccurs='0' maxOccurs='1'>
        <xs:element ref='methodCall'/>
        <xs:element ref='methodResponse'/>
      </xs:choice>
    </xs:complexType>
  </xs:element>

  <xs:element name="methodCall">
    <xs:complexType>
      <xs:all>
        <xs:element name="methodName">
          <xs:simpleType>
            <xs:restriction base="ASCIIString">
              <xs:pattern value="([A-Za-z0-9]|/|\.|:|_)*" />
            </xs:restriction>
          </xs:simpleType>
        </xs:element>
        <xs:element name="params" minOccurs="0" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="param"  type="ParamType" 
                           minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
          </xs:complexType>
         </xs:element>
      </xs:all>
    </xs:complexType>  
  </xs:element>

  <xs:element name="methodResponse">
    <xs:complexType>
      <xs:choice>
        <xs:element name="params">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="param" type="ParamType"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
        <xs:element name="fault">
          <!-- What can appear inside a fault is very restricted -->
          <xs:complexType>
            <xs:sequence>
              <xs:element name="value">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element name="struct"> 
                      <xs:complexType> 
                        <xs:sequence> 
                          <xs:element name="member" 
                                       type="MemberType">
                          </xs:element>
                          <xs:element name="member" 
                                       type="MemberType">
                          </xs:element>
                        </xs:sequence>
                      </xs:complexType>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
         </xs:element>
      </xs:choice>
    </xs:complexType>  
  </xs:element>

  <xs:complexType name="ParamType">
    <xs:sequence>
      <xs:element name="value" type="ValueType"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="ValueType" mixed="true">
    <xs:choice>
      <xs:element name="i4"            type="xs:int"/>
      <xs:element name="int"           type="xs:int"/>
      <xs:element name="string"        type="ASCIIString"/>
      <xs:element name="double"        type="xs:decimal"/>
      <xs:element name="base64"        type="xs:base64Binary"/>
      <xs:element name="boolean"       type="NumericBoolean"/>
      <xs:element name="dateTime.iso8601" type="xs:dateTime"/>
      <xs:element name="array"         type="ArrayType"/>
      <xs:element name="struct"        type="StructType"/>
    </xs:choice>
  </xs:complexType>

  <xs:complexType name="StructType">
    <xs:sequence>
      <xs:element name="member" type="MemberType" 
                   maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="MemberType">
    <xs:sequence>
      <xs:element name="name"  type="xs:string" />
      <xs:element name="value" type="ValueType"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="ArrayType">
    <xs:sequence>
      <xs:element name="data">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="value"  type="ValueType" 
                         minOccurs="0" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="ASCIIString">
    <xs:restriction base="xs:string">
      <xs:pattern value="([ -~]|\n|\r|\t)*" />
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="NumericBoolean">
    <xs:restriction base="xs:boolean">
      <xs:pattern value="0|1" />
    </xs:restriction>
  </xs:simpleType>

</xs:schema>