[tools/odmlparser] Make xml the default RDF format

Author: mpsonntag

odml/tools/odmlparser.py

@@ -69,7 +69,7 @@ def to_string(self, odml_document):
             string_doc = unicode(xmlparser.XMLWriter(odml_document))
         elif self.parser == "RDF":
             # Use turtle as default output format for now.
-            string_doc = RDFWriter(odml_document).get_rdf_str("turtle")
+            string_doc = RDFWriter(odml_document).get_rdf_str("xml")
         else:
             self.parsed_doc = DictWriter().to_dict(odml_document)