XML Schema Definitions
The XML schema definitions for the 'subscriber's status' attribute
within the <status> element and 'network status', 'network-provided
location' and 'subscriber-provided location' attributes within
<3gppAttributes> element located within the <tuple> element are shown in
table 7.x.
Table 7.x: XML schema definition for CPIM PIDF extension
<?xml version="1.0" encoding="UTF-8"?>
   <xs:schema targetNamespace="urn:ietf:params:xml:ns:3gppPresence"
        xmlns:tns="urn:ietf:params:xml:ns:cpim-pidf"
        xmlns:3gpp=" urn:ietf:params:xml:ns:3gppPresence "
        xmlns:xs="http://www.w3.org/2001/XMLSchema"
        elementFormDefault="qualified"
        attributeFormDefault="unqualified">

     <xs:complexType name="tuple">
       <xs:sequence>
        <xs:element name="status" type="tns:status"/>
        <xs:element name="3gppAttributes"  type="3gpp:3gppAttributes"/>
        <xs:element name="contact" type="tns:contact" minOccurs="0"/>
        <xs:element name="note" type="tns:note" minOccurs="0"
            maxOccurs="unbounded"/>
         <xs:element name="timestamp" type="xs:dateTime" minOccurs="0"/>
       </xs:sequence>
       <xs:attribute name="id" type="xs:ID" use="required"/>
     </xs:complexType>

     <xs:complexType name="status">
       <xs:sequence>
         <xs:element name="basic" type="tns:basic" minOccurs="0"/>
         <xs:element name="SubsStatus" minOccurs="0"  maxOccurs="1" >
          <xs:simpleType>   
            <xs:restriction base="xs:string">
              <xs:enumeration value="Willing"/>
              <xs:enumeration value="WillingWithLimitations"/>
              <xs:enumeration value="NotWilling"/>
              <xs:enumeration value="NotDisclosed"/>
              <xs:enumeration value="NULL"/>
            </xs:restriction>
          </xs:simpleType>
         </xs:element>
       </xs:sequence>
     </xs:complexType>

    <xs:complexType name="3gppAttributes">
       <xs:sequence>
          <xs:element name="NetworkStatus"  minOccurs="0"/>
             <xs:simpleType>
                <xs:restriction base="xs:string">
                  <xs:enumeration value="online"/>
                  <xs:enumeration value="offline"/>
                  <xs:enumeration value="NULL"/>
                </xs:restriction>
             </xs:simpleType>
           <xs:element>
           <xs:element name="NetProvLocation" type=”xs:string”
minOccurs="0"/>
           <xs:element name="SubsProvLocation" type=”xs:string”
minOccurs="0"/>
        </xs:sequence>
     </xs:complexType>

   </xs:schema>

Editor’s Note: Since the IETF XML schema is extensible there may not be
any standardization needed in IETF.
7.3.1.3    XML schema description
This subclause describes the elements of the 3GPP CPIM PIDF extension as
defined in table 7.x:
<SubsStatus>:    this element if present, appears as a child element of
the <status> element. It contains one of the following strings:
‘Willing’, ‘WillingWithLimitations’, ‘NotWilling’,
‘NotDisclosed’, or ‘NULL’;
<3gppAttributes>:     this element, if present, appears as a child
element of the <tuple> element and include:
<NetworkStatus>:    this element, if present, includes the ‘network
status’ attribute. The element contains one of the following strings:
‘online’, ‘offline’ or ‘NULL’;
<NetProvLocation>:    this element, if present, includes the ‘network
provided location’ attribute;.
<SubsProvLocation>:    this element, if present, includes the
‘subscriber provided location’ attribute.