One other suggestion. I presume the problem here is that the svg file is legal XML and so parsable as RDF even though not what you want. If you set the parser...
Thanks guys for the explaining the problem and suggestions. It sounds like a complicated problem, but IMO It seems like the model.read method should throw an...
... One of ARP's goals -- remembering that it dates from a time when RDF was rather less well defined -- was to cope with reading RDF/XML which was damaged in...
Hi, Does Jena support multi-user or multi-repository natively? I could not find that piece of information in the documents. By supporting multi-user, I mean...
... That depends on what you mean by "support" ... ... ... in which case, yes, Jena supports multi-user. Users can keep their data in files or in separate...
... See: http://jena.sourceforge.net/IO/iohowto.html#arp-properties you can turn any of the warnings into error conditions. Though as I say you want to use...
Hi Chris, Thanks for the response. ... Sorry about the confusion. I was curious, if Jena supports the scenario above, how would multiple users access Jena? For...
Rather than go into the details of our Jena experimentation I'd rather pose the original design issue and see if folks here have a feel for how we should be...
Andy, Our problem was being unable to query against existing statements in the graph during a transaction, not against the newly added statements. We tried to...
... Yes. Easiest is you have one server controlling access with multiple clients interacting via, e.g. HTTP. See http://joskei.org/ ... No. ... If Jena is...
Hi Andy, initial variable bindings of SPARQL queries do not seem to be used in sub-selects. Is this intentional, and will this be supported in the future? ...
Holger, I tried: SELECT * { { SELECT ?s ?p ?o { ?s ?p ?o} } } And some variations with a preset ?o and got only bindings with the preset ?o value as I...
Andy, sure. Here is an example: Model model = ModelFactory.createDefaultModel(); model.read("http://topbraid.org/examples/kennedys"); String query = "PREFIX...
Is it the case that all of the list... methods (such as model.listClasses(), ontClass.listInstances(), etc.) cause the entire collection of statements or ...
... I don't know how the internals of Jena are organized but I believe there are subject indexes and indexes on multiple parts of a triple, so no sequential...
I'm pleased with how SPARQL queries can be formatted with query.serialize() or toString(), but when I tried some queries with an ARQ extension with terse sytax...
... The output serializer does not do anything special for lists, as you have found out :-) But it is still the same query. The property function spotter is...
... No, it's not. ... As Ignazio says, indexes rather than caches, but yes, there is computational support for making the list..() methods efficient. What ...
Holger, Thanks for the complete, minimal example. I have found out what's going on. It's not a pure bug and needs some thinking about because I have been...
Good, I am glad this helped (a fix is not terribly urgent for me). On a related topic, I was hoping that sub-selects would somehow be context sensitive, and...
Hi, I am currently a student at Texas A&M University and I am working on a project which involves querying Mulgara triple store. Since I am new to Mulgara I...
... Not for the usual memory models or for the database models; they all have indexes. The meory model has S, P, and O indexes, while the database models can...
... SDB and TDB are both fully indexed [*] and do engage in a large amount of caching as well. Andy [*] In TDB it is not necessary to fully index but the...
Hello David, Sorry not to reply sooner - your message was mis-assigned into my spamtrap. It sounds as though you have a workaround for your problem. If you...
... Not really, I'm afraid. The Jena adapter in Mulgara, if it is still there, is basically broken. It tries to work by implementing a rather wide interface...
Hi, I've been playing around with RDB in the past, and I have a few projects that I would like to update. Do you have a pointer to the tradeoff between SDB and...
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