read_user_data.xsd

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <xs:include schemaLocation="error.xsd"/>

    <xs:complexType name="ReadUserData">
        <xs:attribute name="agent_id" use="required"/>
        <xs:attribute name="application_id" use="required"/>
    </xs:complexType>

    <!-- in -->
    <xs:element name="in">
        <xs:complexType>
            <xs:all>
                <xs:element name="request">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="read_user_data" type="ReadUserData"/>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
            </xs:all>
        </xs:complexType>
    </xs:element>
    <!-- out -->
    <xs:element name="out">
        <xs:complexType>
            <xs:choice>
                <xs:element name="response">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="user_data">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"  />
                                    </xs:sequence>
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                    </xs:complexType>
                </xs:element>
                <xs:element name="error" type="errorType"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>
</xs:schema>