<xs:element name="ProviderId">
    <xs:annotation>
        <xs:documentation> 
================================== ProviderId ==================================
An identifier for the news provider that produced the NewsItem. The
provider's ID is specified in the element content. This should be an Internet
domain name that is owned by the provider at the date identified by the DateId
subelement of the NewsIdentifier.

Because the domain name "iptc.org" was owned on 1 October 2000 by the
International Press Telecommunications Council (IPTC) and no-one else, it is
certain that IPTC is the provider in this case.
================================================================================

			</xs:documentation>
    </xs:annotation>
    <xs:complexType>
        <xs:simpleContent>
            <xs:extension base="xs:string">
                <xs:attribute name="Vocabulary" type="xs:string" />
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>
    <!--
Example: 
<NewsIdentifier>
 <ProviderId>iptc.org</ProviderId>
 <DateId>20001001</DateId>
 <NewsItemId>NewsML version 1.0</NewsItemId>
 <RevisionId>1</RevisionId
</NewsIdentifier>
-->
</xs:element>