On 10/12/10 6:21 AM, Svatopluk Šperka wrote: > Hi, > > thank you very much for answering but I guess you don't understand what the > problem is. > > I'm loading schemas for RDF and RDFS where namespaces are defined - they are > correct documents and I'm able to load them without problem when there's no > handler for namespace declaration registered (qnames get expanded to URIs). > When I register a handler, two types of error appear: > > 1) URI file:///Users/beho/Projects/connexion/./import/22-rdf-syntax-ns:7 > raptor error - The namespace prefix in "owl:Ontology" was not declared. > 2) URI file:///Users/beho/Projects/connexion/./import/22-rdf-syntax-ns:8 > raptor warning - Using node element 'Ontology' without a namespace is > forbidden. > > My interpretation, without knowing internals of raptor, would be that when > custom handler is registered, the default one is not which is why raptor > does not know about declared namespaces when parsing triples. > > I could paste a piece of code if it would help.
Please file a bug at http://bugs.librdf.org/ with the example code and data that shows the problem. Thanks Dave > > Thanks again. > > Svatopluk Šperka > > On 10/12/10 7:53 , Dave Beckett wrote: >> On 10/11/10 2:32 AM, Svatopluk Šperka wrote: >>> Hi, >>> >>> I use raptor to parse RDF and transform it to my internal representation >>> and now I decided to use declared namespaces to optimise this >>> representation for space. >>> >>> Problem is that after setting namespace handler using >>> raptor_set_namespace_handler (version 1.4.19 is used) parser complains >>> "namespace prefix in ... was not declared". I guess I should register >>> the namespace somehow for the parser but I couldn't figure out how from >>> the documentation. Could someone give me a clue ? >>> >>> Thanks in advance for any help. >> In RDF syntaxes, namespaces are an abbreviation mechanism for URIs, >> sometimes called QNames or Curies. >> >> In a parser - syntax->RDF triples - the mapping is defined by the syntax >> specifications, there is no API to allow illegal syntax with undefined >> prefixes. Syntaxes are intended to be portable representations of RDF >> triples. >> >> In a serializer - RDF triples->syntax - you can declare namespaces since the >> user has a choice of how the output format looks. >> >> That's raptor_serialize_set_namespace() as documented in >> http://librdf.org/raptor/api-1.4/raptor-section-serializer.html#raptor-serialize-set-namespace >> >> >> Dave > > _______________________________________________ redland-dev mailing list [email protected] http://lists.librdf.org/mailman/listinfo/redland-dev
