def detect_namespace(rdf):
"""Try to automatically detect the URI namespace of the vocabulary.
Return namespace as URIRef.
"""
# pick a concept
conc = rdf.value(None, RDF.type, SKOS.Concept, any=True)
if conc is None:
logging.critical(
"Namespace auto-detection failed. "
"Set namespace using the --namespace option.")
sys.exit(1)
ln = localname(conc)
ns = URIRef(conc.replace(ln, ''))
if ns.strip() == '':
logging.critical(
"Namespace auto-detection failed. "
"Set namespace using the --namespace option.")
sys.exit(1)
logging.info(
"Namespace auto-detected to '%s' "
"- you can override this with the --namespace option.", ns)
return ns
def detect_namespace(rdf):
"""Try to automatically detect the URI namespace of the vocabulary.
Return namespace as URIRef.
"""
# pick a concept
conc = rdf.value(None, RDF.type, SKOS.Concept, any=True)
if conc is None:
logging.critical("Namespace auto-detection failed. "
"Set namespace using the --namespace option.")
sys.exit(1)
ln = localname(conc)
ns = URIRef(conc.replace(ln, ''))
if ns.strip() == '':
logging.critical("Namespace auto-detection failed. "
"Set namespace using the --namespace option.")
sys.exit(1)
logging.info(
"Namespace auto-detected to '%s' "
"- you can override this with the --namespace option.", ns)
return ns
def detect_namespace(self):
"""
Attempts to extract a base namespace from the vocabulary graph.
Will first find a random concept or concept scheme and then extract the base name space from it.
:raises NoNamespaceDetectedError: If no namespace can be found.
"""
concept = self.rdf.value(None, RDF.type, SKOS.Concept, any=True)
if concept is None:
concept = self.rdf.value(None,
RDF.type,
SKOS.ConceptScheme,
any=True)
if concept is None:
raise NoNamespaceDetectedError(
'Could not detect a namespace for ' + self.name +
', because there are no SKOS Concepts or SKOS Concept Schemes defined.'
)
local_name = concept.split('/')[-1].split('#')[-1]
namespace = URIRef(concept.replace(local_name, '').strip('#'))
if namespace.strip() == '':
raise NoNamespaceDetectedError(
'Could not detect a namespace for ' + self.name +
', because the URI is not valid.')
self.logger.info('Namespace detection successful: %s.', namespace)
self.namespace = namespace
