Yes, this was my point: a SPARQL (RDF) dataset is not a syntactic construct. It is a collection of graphs defined by its behavior.
If you could write some more about your use case for this mechanism, we might be able to help you resolve it by some other means… --- A. Soroka The University of Virginia Library > On Mar 3, 2016, at 6:27 PM, Martynas Jusevičius <marty...@graphity.org> wrote: > > As far as I understand, prefix mapping is only available after > parsing, as it's a purely syntactic thing. Some syntaxes have prefixes > (Turtle or RDF/XML, for example), some don't (N-Triples). So in > general you cannot retrieve them, as there is no such thing in the RDF > data model. I might be wrong though :) > > On Fri, Mar 4, 2016 at 12:22 AM, Valerio Belcastro > <valerio.belcas...@gmail.com> wrote: >> Jena Graph class has the method getPrefixMapping() >> <https://jena.apache.org/documentation/javadoc/jena/org/apache/jena/graph/Graph.html#getPrefixMapping-->. >> This method returns a map that associates prefixes to their uri. I would >> like to achieve the same behaviour with a remote graph without using >> DatasetAccessor. >> >> 2016-03-03 23:12 GMT+01:00 A. Soroka <aj...@virginia.edu>: >> >>> If you are talking about a graph accessed via SPARQL, it’s not clear (to >>> me) what you mean by “prefix mapping”. A SPARQL dataset doesn’t have a >>> prefix mapping that is constant between queries. Is there something else >>> you mean by the term? >>> >>> --- >>> A. Soroka >>> The University of Virginia Library >>> >>>> On Mar 3, 2016, at 4:00 PM, Valerio Belcastro < >>> valerio.belcas...@gmail.com> wrote: >>>> >>>> Hi guys, >>>> >>>> Is it possible to get prefix mapping from remote graph in Jena? >>>> >>>> I know that I can get a model (and then its prefix mapping) through >>>> DatasetAccessor class, but I think it is too much expensive when using a >>>> model containing large amounts of triples. Is there another way to >>> achieve >>>> this or am I missing something? >>>> >>>> thank you in advance >>> >>>
