Hi Carmen, thanks for your answer. I had a look at http://rdf.rubyforge.org, looks very nice, I am going to give it a try.
I did not understood everything you posted, but your examples are about reading existing rdf-files/models, right? That's not what I meant, though. I want to provide a dataset in rdf-xml-format. The problem is that adding all the data to a Redland::Model takes ages, before I can print the contents to an rdf-file. That might be due to background actions on the rdf graph (node-finding, isomorphism checks, ..) that you where talking about (even though we dont have any blank nodes). Can I use Raptor somehow to avoid building the graph, and just print an rdf-file with my triples? Regards, Martin On Tue, Sep 7, 2010 at 11:10 PM, carmen <[email protected]> wrote: >>slower to add new nodes to a root node triples that have the new nodes as >>subject. > > > is your entire graph contained in blank nodes hanging off a single subject? a > pathological case that could be slow in any framework, (rebalancing, > node-finding, isomorphism checks, yadda. see > http://blog.datagraph.org/2010/03/rdf-isomorphism ) > >> I just want my triples printed out > > simplesy way is #yield parse_as_stream.(example > http://gitorious.org/element/element/blobs/master/ruby/W/rdf.rb#line40 and > theres gem using FFI rather than SWIG (possibly faster, possibly not) > http://rdf.rubyforge.org/raptor/) > > > > > to print pass triple-yield a function: > > eg resourcename.raptor{|s,p,o| > puts"s "+s.class.to_s+" "+s.to_s+"\n"+ > "p "+p.class.to_s+" "+p.to_s+"\n"+ > "o "+o.class.to_s+" "+o.to_s} > > > > almost surely faster using a JSON model w/o SWIG sitting between: > > > def fromStream m,*i > send(*i) do |s,p,o| > m[s] ||= {'uri'=>s} > m[s][p] ||= [] > m[s][p].push o > end; m > end > > > model={} > > (E 'somefile.rdf').fromStream m, :redland > > ( i rarely use blank nodes, but when i do theyre just JSON objects in the > literal position of a statement without a 'uri' field..) > > > for just parsing, Raptor is extremely fast, perhaps the fastest... > _______________________________________________ > redland-dev mailing list > [email protected] > http://lists.librdf.org/mailman/listinfo/redland-dev > -- Dipl-Inf. Martin Gütlein Phone: +49 (0)761 203 8442 (office) +49 (0)177 623 9499 (mobile) Email: [email protected] _______________________________________________ redland-dev mailing list [email protected] http://lists.librdf.org/mailman/listinfo/redland-dev
