xmlresults.py 文件源码

def write_binding(self, name, val):
        assert self._resultStarted

        attr_vals = {
            (None, u'name'): unicode(name),
        }
        attr_qnames = {
            (None, u'name'): u'name',
        }
        self.writer.startElementNS(
            (SPARQL_XML_NAMESPACE, u'binding'),
            u'binding', AttributesNSImpl(attr_vals, attr_qnames))

        if isinstance(val, URIRef):
            self.writer.startElementNS(
                (SPARQL_XML_NAMESPACE, u'uri'),
                u'uri', AttributesNSImpl({}, {}))
            self.writer.characters(val)
            self.writer.endElementNS(
                (SPARQL_XML_NAMESPACE, u'uri'), u'uri')
        elif isinstance(val, BNode):
            self.writer.startElementNS(
                (SPARQL_XML_NAMESPACE, u'bnode'),
                u'bnode', AttributesNSImpl({}, {}))
            self.writer.characters(val)
            self.writer.endElementNS(
                (SPARQL_XML_NAMESPACE, u'bnode'), u'bnode')
        elif isinstance(val, Literal):
            attr_vals = {}
            attr_qnames = {}
            if val.language:
                attr_vals[(XML_NAMESPACE, u'lang')] = val.language
                attr_qnames[(XML_NAMESPACE, u'lang')] = u"xml:lang"
            elif val.datatype:
                attr_vals[(None, u'datatype')] = val.datatype
                attr_qnames[(None, u'datatype')] = u'datatype'

            self.writer.startElementNS(
                (SPARQL_XML_NAMESPACE, u'literal'),
                u'literal', AttributesNSImpl(attr_vals, attr_qnames))
            self.writer.characters(val)
            self.writer.endElementNS(
                (SPARQL_XML_NAMESPACE, u'literal'), u'literal')

        else:
            raise Exception("Unsupported RDF term: %s" % val)

        self.writer.endElementNS(
            (SPARQL_XML_NAMESPACE, u'binding'), u'binding')