xmlns:tns="http://www.blackperl.com/XML/ChangeLog"

    targetNamespace="http://www.blackperl.com/XML/ChangeLog"

    elementFormDefault="qualified" attributeFormDefault="unqualified"

    version="0.93" id="changelog0.93">

      Refer to this schema using the following namespace:

      http://www.blackperl.com/XML/ChangeLog

  -->

  <xsd:annotation>

    <xsd:documentation>

      A description of an XML application which itemizes changes over the

      life-span of a software project. Changes are tracked by releases, with a

      granularity of individual items made up of files that were affected.

    </xsd:documentation>

    <xsd:appinfo xmlns:dc="http://purl.org/dc/elements/1.1/">

      <dc:creator>Randy J. Ray (rjray@blackperl.com)</dc:creator>

      <dc:date>2004-11-22</dc:date>

      <dc:subject>changelog,xml,schema</dc:subject>

      <dc:description>

        An XML Schema declaration describing an XML expression of software

        project change-logs.

      </dc:description>

    </xsd:appinfo>

    <xsd:appinfo>

               xmlns:dc="http://purl.org/dc/elements/1.1/"

               xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

        <cc:Work rdf:about="">

          <dc:title>XML Schema for Changelogs</dc:title>

          <dc:description>

            An XML Schema declaration describing an XML expression of software

            project change-logs.

          </dc:description>

          <dc:creator>

            <cc:Agent>

              <dc:title>Randy J. Ray</dc:title>

            </cc:Agent>

          </dc:creator>

          <dc:rights>

            <cc:Agent>

              <dc:title>Randy J. Ray</dc:title>

            </cc:Agent>

          </dc:rights>

          <dc:type rdf:resource="http://purl.org/dc/dcmitype/Text" />

          <cc:license rdf:resource="http://creativecommons.org/licenses/by-sa/2.0/" />

        </cc:Work>

        <cc:License rdf:about="http://creativecommons.org/licenses/by-sa/2.0/">

          <cc:permits rdf:resource="http://web.resource.org/cc/Reproduction" />

          <cc:permits rdf:resource="http://web.resource.org/cc/Distribution" />

          <cc:requires rdf:resource="http://web.resource.org/cc/Notice" />

          <cc:requires rdf:resource="http://web.resource.org/cc/Attribution" />

          <cc:permits rdf:resource="http://web.resource.org/cc/DerivativeWorks" />

          <cc:requires rdf:resource="http://web.resource.org/cc/ShareAlike" />

        </cc:License>

      </rdf:RDF>

    </xsd:appinfo>

  </xsd:annotation>

                   mixed="true">

    <xsd:annotation>

      <xsd:documentation>

        An open-ended container type for including version-control information

        at various levels within the changelog structure. This is the only

        type which explicitly permits content from foreign namespaces.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:sequence maxOccurs="unbounded" minOccurs="0">

      <xsd:any processContents="lax" />

    </xsd:sequence>

    <xsd:attribute name="source" type="xsd:anyURI" />

    <xsd:anyAttribute namespace="##other" processContents="lax" />

  </xsd:complexType>

  <xsd:complexType id="descriptionType" name="descriptionType">

    <xsd:annotation>

      <xsd:documentation>

        A description block is used to document everything from specific change

        items to the release as a whole.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:simpleContent>

      <xsd:extension base="xsd:string">

        <xsd:attribute default="en-US" name="lang" type="xsd:language" />

      </xsd:extension>

    </xsd:simpleContent>

  </xsd:complexType>

  <xsd:simpleType id="versionString" name="versionString">

    <xsd:annotation>

      <xsd:documentation>

        The versionString type is applied to attributes that describe simple

        revision-number strings. It only supports CVS (RCS) styled version

        numbers.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:restriction base="xsd:string">

      <xsd:pattern value="\d+(\.\d+)*" />

    </xsd:restriction>

  </xsd:simpleType>

  <xsd:complexType id="fileType" name="fileType">

    <xsd:annotation>

      <xsd:documentation>

        The fileType definition is used for the file element, a part of the

        itemType declaration. It is defined separately so that it can be

        referred to from multiple places.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:sequence maxOccurs="1" minOccurs="0">

                   minOccurs="0" maxOccurs="unbounded" />

                   type="tns:informationType" nillable="true" />

    </xsd:sequence>

    <xsd:attribute name="path" type="xsd:string" use="required" />

    <xsd:attribute name="revision" type="tns:versionString" use="optional"/>

    <xsd:attribute name="author" type="xsd:NMTOKEN" use="optional" />

    <xsd:attribute name="action" use="optional">

      <xsd:simpleType>

        <xsd:restriction base="xsd:NMTOKEN">

          <xsd:enumeration value="ADD" />

          <xsd:enumeration value="DELETE" />

          <xsd:enumeration value="RESTORE" />

          <xsd:enumeration value="MOVE" />

        </xsd:restriction>

      </xsd:simpleType>

    </xsd:attribute>

    <xsd:attribute name="note" type="xsd:string" use="optional" />

  </xsd:complexType>

  <xsd:element id="file" name="file" nillable="true" type="tns:fileType">

    <xsd:annotation>

      <xsd:documentation>

        A file element contains a single block representing a fileType.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:unique name="fileDescriptionLangConstraint">

      <xsd:selector xpath="tns:description" />

      <xsd:field xpath="@lang" />

    </xsd:unique>

  </xsd:element>

  <xsd:complexType id="itemType" name="itemType">

    <xsd:annotation>

      <xsd:documentation>

        These element blocks define a single change-item within the scope of a

        given release. A change-item consists of one or more files that were

        affected, and a description of the change itself.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:sequence>

                   type="tns:informationType" nillable="true" />

      <xsd:choice minOccurs="1" maxOccurs="1">

        <xsd:element ref="tns:file" />

        <xsd:element name="fileset" nillable="false">

          <xsd:complexType>

            <xsd:sequence>

                           type="tns:informationType" nillable="true" />

              <xsd:element maxOccurs="unbounded" minOccurs="1" ref="tns:file" />

            </xsd:sequence>

          </xsd:complexType>

        </xsd:element>

      </xsd:choice>

                   minOccurs="1" maxOccurs="unbounded" />

    </xsd:sequence>

    <xsd:attribute name="id" type="xsd:ID" />

  </xsd:complexType>

  <xsd:element id="item" name="item" nillable="false" type="tns:itemType">

    <xsd:annotation>

      <xsd:documentation>

        An item element contains a single block representing an itemType.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:unique name="itemDescriptionLangConstraint">

      <xsd:selector xpath="tns:description" />

      <xsd:field xpath="@lang" />

    </xsd:unique>

  </xsd:element>

  <xsd:complexType id="releaseType" name="releaseType">

    <xsd:annotation>

      <xsd:documentation>

        The release is the primary piece of information that a changelog

        collects and organizes. A release contains an optional description,

        followed by one or more item blocks. The release element is also the

        greatest user of attributes besides the file element. A release element

        must have at least a "version" attribute, uniquely identifying the

        release itself. Additionally, it may have "tag" to associate it with

        a release-system tag and "date" to specify the date the release was

        created.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:sequence>

                   minOccurs="0" maxOccurs="unbounded" />

                   type="tns:informationType" nillable="true" />

                   type="tns:informationType" nillable="true" />

      <xsd:element maxOccurs="unbounded" minOccurs="1" ref="tns:item" />

    </xsd:sequence>

    <xsd:attribute name="version" type="xsd:token" use="required" />

    <xsd:attribute name="tag" type="xsd:NMTOKEN" />

    <xsd:attribute name="date" type="xsd:token" use="required" /> 

  </xsd:complexType>

               type="tns:releaseType">

    <xsd:annotation>

      <xsd:documentation>

      </xsd:documentation>

    </xsd:annotation>

    <xsd:unique name="releaseDescriptionLangConstraint">

      <xsd:selector xpath="tns:description" />

      <xsd:field xpath="@lang" />

    </xsd:unique>

  </xsd:element>

  <xsd:element id="changelog" name="changelog" nillable="false">

    <xsd:annotation>

      <xsd:documentation>

        The changelog element is intended as the document root element. It

        contains an overview element (identical in structure to the description

        element, but named differently to prevent collision in XPath queries)

        and one or more release blocks.

      </xsd:documentation>

    </xsd:annotation>

    <xsd:complexType>

      <xsd:sequence>

                     nillable="false" type="tns:descriptionType" />

                   type="tns:informationType" nillable="true" />

                     type="tns:informationType" nillable="true" />

        <xsd:element maxOccurs="unbounded" minOccurs="1" ref="tns:release" />

      </xsd:sequence>

    </xsd:complexType>

    <xsd:unique name="changelogDescriptionLangConstraint">

      <xsd:selector xpath="tns:description" />

      <xsd:field xpath="@lang" />

    </xsd:unique>

  </xsd:element>

</xsd:schema>