rdfxml.py 文件源码

def predicate(self, predicate, object, depth=1):
        write = self.write
        indent = "  " * depth
        qname = self.store.namespace_manager.qname(predicate)

        if isinstance(object, Literal):
            attributes = ""

            if object.language:
                attributes += ' xml:lang="%s"' % object.language

            if object.datatype:
                attributes += ' rdf:datatype="%s"' % object.datatype

            write("%s<%s%s>%s</%s>\n" %
                  (indent, qname, attributes,
                   escape(object, ESCAPE_ENTITIES), qname))
        else:

            if isinstance(object, BNode):
                write('%s<%s rdf:nodeID="%s"/>\n' %
                      (indent, qname, object))
            else:
                write("%s<%s rdf:resource=%s/>\n" %
                      (indent, qname, quoteattr(self.relativize(object))))