- add namespace

- warn for term in missing namespace

Author: pvgenuchten

csvwlib/converter/ToRDFConverter.py

@@ -70,12 +70,16 @@ def parse_virtual_columns(self, row_node, atdm_row, table_metadata):
                 continue
             subject = URIRef(UriTemplateUtils.insert_value(virtual_column['aboutUrl'], atdm_row, '',
                                                            table_metadata['url']))
+
             predicate = Namespaces.get_term(virtual_column['propertyUrl'])
-            obj = UriTemplateUtils.insert_value(virtual_column['valueUrl'], atdm_row, '', table_metadata['url'])
-            obj = CommonProperties.expand_property_if_possible(obj)
-            self.graph.add((subject, predicate, URIRef(obj)))
-            if self.mode == CONST_STANDARD_MODE:
-                self.graph.add((row_node, CSVW.describes, subject))
+            if predicate:
+                obj = UriTemplateUtils.insert_value(virtual_column['valueUrl'], atdm_row, '', table_metadata['url'])
+                obj = CommonProperties.expand_property_if_possible(obj)
+                self.graph.add((subject, predicate, URIRef(obj)))
+                if self.mode == CONST_STANDARD_MODE:
+                    self.graph.add((row_node, CSVW.describes, subject))
+            else:
+                print(f"term {virtual_column['propertyUrl']} not in namespaces")
 
     def _add_file_metadata(self, metadata, node):
         language = JSONLDUtils.language(self.metadata['@context'])

csvwlib/utils/rdf/Namespaces.py

@@ -25,6 +25,7 @@ def all():
             'org': Namespace('http://www.w3.org/ns/org#'),
             'owl': Namespace('http://www.w3.org/2002/07/owl#'),
             'prov': Namespace('http://www.w3.org/ns/prov#'),
+            'qudt': Namespace('http://qudt.org/1.1/schema/qudt#'),
             'qb': Namespace('http://purl.org/linked-data/cube#'),
             'rdf': Namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#'),
             'rdfa': Namespace('http://www.w3.org/ns/rdfa#'),