On 24/04/15 20:00, souri datta wrote:
Hi,
When I am parsing an N-quad using Jena, is it possible to keep the blank
node id same after parsing?
For e.g., if I have a blank n-quad like
_:bsomerandomid <ns:pred> <http://foo.com> <foo> .
After parsing, when I do
subject.getBlankNodeId() it runs a randomly generated string which is
different from "_:bsomerandomid" .
Is it possible to set some flags so that I get blank the same id as present
in the input quad?
Hi,
As David say, blank nodes are not for identification so maybe you need
some kind of stable label liek a <urn:uuid:....>
Warning - if you work with the blanknode labels as given you will not be
following RDF. "_:a" in one file is different to "_:a" in another file
or even if the same file is read twice.
With your code (*) I get
bsomerandomid
The "_:" is not part of the blank node id.
"createUseLabelEncoded" generates legal blank node labels directly
related to the string given.
The correct form generates a globally unique id that never clashes with
any other (well, its related to a 122 bit random number).
Please take care with code next time - HTML gets converted and formatted
HTML is messed up.
Andy
Thanks,
Souri
*Code used:*
*private ParserProfileBase profile = new ParserProfileBase(new
Prologue(null,*
* IRIResolver.createNoResolve()),*
* ErrorHandlerFactory.errorHandlerStrictSilent(),*
* LabelToNode.createUseLabelEncoded());*
* profile.setStrictMode(true);*
*}*
*List<Quad> output = new ArrayList<>();*
*Tokenizer tokenizer = TokenizerFactory.makeTokenizerString(line);*
*LangNQuads parser = new LangNQuads(tokenizer, profile, null);*
* while (parser.hasNext()) {*
* output.add(parser.next());*
* }*
* output.get(0).getSubject().getBlankNodeId();*
