alfresco-community-repo/config/alfresco/model/systemModel.xml

<model name="sys:systemmodel" xmlns="http://www.alfresco.org/model/dictionary/1.0">

	<description>Alfresco Repository System Definitions</description>
	<author>Alfresco</author>
	<published>2005-09-29</published>
	<version>1.0</version>

	<imports>
		<import uri="http://www.alfresco.org/model/dictionary/1.0" prefix="d" />
	</imports>

	<namespaces>
		<namespace uri="http://www.alfresco.org/model/system/1.0" prefix="sys" />
	</namespaces>

	<types>

		<type name="sys:base">
			<title>Base</title>
			<mandatory-aspects>
				<aspect>sys:referenceable</aspect>
			</mandatory-aspects>
		</type>

		<type name="sys:descriptor">
		   <title>Descriptor</title>
			<parent>sys:base</parent>
			<properties>
				<property name="sys:versionMajor">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
				<property name="sys:versionMinor">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
				<property name="sys:versionRevision">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
				<property name="sys:versionLabel">
					<type>d:text</type>
				</property>
				<property name="sys:versionSchema">
					<type>d:int</type>
					<mandatory enforced="true">true</mandatory>
					<default>0</default>
				</property>
				<property name="sys:versionEdition">
					<type>d:any</type>
					<multiple>true</multiple>
				</property>					
			</properties>
        </type>		

		<type name="sys:container">
			<title>Container</title>
			<parent>sys:base</parent>
			<associations>
				<child-association name="sys:children">
                    <source>
                        <mandatory>false</mandatory>
                        <many>true</many>
                    </source>
					<target>
						<class>sys:base</class>
                        <mandatory>false</mandatory>
                        <many>true</many>
					</target>
				</child-association>
			</associations>
		</type>

		<type name="sys:store_root">
			<title>Store Root</title>
			<parent>sys:container</parent>
			<mandatory-aspects>
				<aspect>sys:aspect_root</aspect>
			</mandatory-aspects>
		</type>

		<type name="sys:reference">
			<title>Reference</title>
			<parent>sys:base</parent>
			<properties>
				<property name="sys:reference">
					<type>d:noderef</type>
					<mandatory enforced="true">true</mandatory>
				</property>
			</properties>
		</type>
		
	</types>


	<aspects>

		<aspect name="sys:aspect_root">
			<title>Root</title>
		</aspect>

		<!-- aspect to store the fundamental node identifiers -->
		<aspect name="sys:referenceable">
			<title>Referenceable</title>
			<properties>
				<property name="sys:store-protocol">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
				<property name="sys:store-identifier">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
				<property name="sys:node-uuid">
					<type>d:text</type>
					<mandatory enforced="true">true</mandatory>
				</property>
			</properties>
		</aspect>

		<!-- aspect to tag incomplete nodes -->
		<aspect name="sys:incomplete">
			<title>Incomplete</title>
		</aspect>
      
      <!-- details stored on archived nodes -->
      <aspect name="sys:archived">
         <title>Archived</title>
         <properties>
            <property name="sys:archivedOriginalParentAssoc">
               <type>d:childassocref</type>
               <mandatory>true</mandatory>
            </property>
            <property name="sys:archivedBy">
               <type>d:text</type>
               <mandatory>true</mandatory>
            </property>
            <property name="sys:archivedDate">
               <type>d:datetime</type>
               <mandatory>true</mandatory>
            </property>
         </properties>
      </aspect>
      <aspect name="sys:archived-assocs">
         <properties>
            <property name="sys:archivedParentAssocs">
               <type>d:childassocref</type>
               <mandatory>false</mandatory>
               <multiple>true</multiple>
               <index enabled="false" />
            </property>
            <property name="sys:archivedChildAssocs">
               <type>d:childassocref</type>
               <mandatory>false</mandatory>
               <multiple>true</multiple>
               <index enabled="false" />
            </property>
            <property name="sys:archivedSourceAssocs">
               <type>d:assocref</type>
               <mandatory>false</mandatory>
               <multiple>true</multiple>
               <index enabled="false" />
            </property>
            <property name="sys:archivedTargetAssocs">
               <type>d:assocref</type>
               <mandatory>false</mandatory>
               <multiple>true</multiple>
               <index enabled="false" />
            </property>
         </properties>
      </aspect>

	</aspects>

</model>