Index: includes/Export.php
===================================================================
--- includes/Export.php	(revision 103249)
+++ includes/Export.php	(working copy)
@@ -521,6 +521,12 @@
 
 		$out .= $this->writeTimestamp( $row->rev_timestamp );
 
+		if ( $row->rev_sha1 ) {
+			$out .= "      " . Xml::element('sha1', null, strval($row->rev_sha1) ) . "\n";
+		} else {
+			$out .= "      <sha1/>\n";
+		}
+		
 		if ( $row->rev_deleted & Revision::DELETED_USER ) {
 			$out .= "      " . Xml::element( 'contributor', array( 'deleted' => 'deleted' ) ) . "\n";
 		} else {
Index: docs/export-0.6.xsd
===================================================================
--- docs/export-0.6.xsd	(revision 103249)
+++ docs/export-0.6.xsd	(working copy)
@@ -15,8 +15,9 @@
 
 	Version 0.5 adds byte count per revision.
 	
-	Version 0.6 adds a separate namespace tag, locates the
-	redirect target and strips of the namespace from the title. 
+	Version 0.6 adds: a separate namespace tag, locates the 
+	redirect target, strips of the namespace from the title
+	adds a sha1 tag.  
 	
 	The canonical URL to the schema document is:
 	http://www.mediawiki.org/xml/export-0.6.xsd
@@ -134,6 +135,7 @@
 		<sequence>
 			<element name="id" type="positiveInteger" minOccurs="0"/>
 			<element name="timestamp" type="dateTime"/>
+			<element name="sha1" type="mw:HashType" />
 			<element name="contributor" type="mw:ContributorType"/>
 			<element name="minor" minOccurs="0" />
 			<element name="comment" type="mw:CommentType" minOccurs="0"/>
@@ -178,6 +180,12 @@
 		</simpleContent>
 	</complexType>
 	
+	<complexType name="HashType">
+		<sequence>
+			<element name="sha1" type="string" minOccurs="0"/>	
+		</sequence>
+	</complexType>
+	
 	<complexType name="ContributorType">
 		<sequence>
 			<element name="username" type="string" minOccurs="0"/>