target_node = RDF.Node(RDF.Uri(target_uri))
source_stmt = RDF.Statement(target_node, dcNS['source'], seq.filenode)
self.model.add_statement(source_stmt)
target_node = RDF.Node(RDF.Uri(target_uri))
source_stmt = RDF.Statement(target_node, dcNS['source'], seq.filenode)
self.model.add_statement(source_stmt)