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
