Dear F,
There isn't any functionality in the rapper command line tool for
choosing different identifier generator.
However libraptor does have support for custom generation of blank node
identifiers:
raptor_world_set_generate_bnodeid_handler()
There is some documentation for this here:
http://librdf.org/raptor/api/raptor2-section-world.html#raptor-world-set-generate-bnodeid-handler
And the default implementation is defined here:
https://github.com/dajobe/raptor/blob/master/src/raptor_general.c#L283
librdf uses a seperate implementation, to ensure that every blank node
in a world is unique:
https://github.com/dajobe/librdf/blob/master/src/rdf_raptor.c#L139
https://github.com/dajobe/librdf/blob/master/src/rdf_init.c#L532
The challenge with identifier generation is ensuring that they are
unique.
I guess you could write some kind of hash function that hashes the
integer identifier, but that wouldn't result in different bnode
identifiers in different documents. Creating a random seed also wouldn't
guarantee it, but would significantly reduce the risk.
The advantage of blank node identifiers like _:genid1, is that they
don't pretend that there won't be conflicts between documents.
nick.
On 2017-04-21 01:56, F wrote:
Hello,
I'm trying to use rapper to convert a bunch of rdf/xml files to nt.
Currently, it's assigning sequential names to blank nodes, like
_:genid1, _:genid2, and so forth. I'd like to know if it's possible to
use more randomized names instead (something like
_:olret5ry67uyhgrt5zcx).
Thank you.
_______________________________________________
redland-dev mailing list
[email protected]
http://lists.librdf.org/mailman/listinfo/redland-dev
_______________________________________________
redland-dev mailing list
[email protected]
http://lists.librdf.org/mailman/listinfo/redland-dev
