D(node-metadata-equality-string,name:http://www.sleepycat.com/2002/dbxml,=,'sgml.xml',P(edge-attribute-equality-string,prefix,xref.@xrefid)) P(edge-attribute-equality-string,prefix,xref.@xrefid) D(node-metadata-equality-string,name:http://www.sleepycat.com/2002/dbxml,=,'sgml.xml',V(edge-attribute-equality-string,topic.@topicid,=,'[to be calculated]')) V(edge-attribute-equality-string,topic.@topicid,=,'[to be calculated]')