- From: Jean-Marc Vanel <jeanmarc.vanel@gmail.com>
- Date: Mon, 12 Sep 2011 15:33:32 +0200
- To: Norman Gray <norman@astro.gla.ac.uk>
- Cc: Linking Open Data <public-lod@w3.org>
Well, I was too optimistic about the jar dependencies. There are 2 more jar necessary to run the code sample : 136987 oscache-2.4.1.jar 44598 commons-logging-api-1.1.jar OSCache is used to cache the parsed RDF/N3; this is useful in the context of a GUI , and it should be made facultative. This rises the bytes to : 136987 + 44598 + 1031194 + 383791 + 481535 2,078,105 2011/9/12 Jean-Marc Vanel <jeanmarc.vanel@gmail.com>: > That's a good question that I asked myself when I started EulerGUI. > And I couldn't also find a right answer. > Then the project, geared towards GUI and rules, proceeded, and I > forgot the question. We used Jena for parsing RDF/XML, OWL-API for > OWL/XML. > And for N3 including quoted graphs and rules, we built a parser. > Then , along the way , we built an API able to parse any RDF dialect ( > Turtle/N3, RDF/XML, OWL/XML, and more ) . > Here is a sample: > > SourceFactory factory = new SourceFactory(); > N3Source n3 = factory.addSource(new URL( > "https://eulergui.svn.sourceforge.net/svnroot/eulergui/trunk/eulergui/examples/parents.n3"), > null); > ParserLink pl = new ParserLink(); > pl.parse( n3 ); > ListStorageTripleHandler handler = new ListStorageTripleHandler(); > pl.visitAllURI( handler ); > System.out.println( handler.getTriples() ); > List<ITriple> triples = handler.getTriples(); > System.out.println( triples ); > > To do this , these 3 jar are needed : > > eulergui-1.9-SNAPSHOT.jar 1031194 > /home/jmv/.m2/repository/parser4j/all/trunk3/all-trunk3.jar 383791 > log4j-1.2.16.jar 481535 > > which amounts to this total : > 1031194 + 383791 + 481535 > 1,896,520 bytes > > > 2011/9/12 Norman Gray <norman@astro.gla.ac.uk>: >> >> Greetings. >> >> Can anyone point me towards a simple/lightweight Java RDF library? >> >> Here, I mean 'lightweight' in the sense of having a small API, rather than a small jar, because if one is trying to persuade people that RDF is a useful and practical thing, then hauling out a manual which could crush a small donkey is a difficult place to start. I want an RDF gateway drug^Wlibrary. >> >> All I really want to be able to (demonstrate I can) do is to read and write RDF/XML and Turtle, create triples, and iterate through a graph. Simple inference I wouldn't say no to, but wouldn't need; and SPARQL would be unnecessary for the scope and userbase I have in mind. >> >> Ideally, I'd like to be able to say "here is a little jar to put on your classpath, and here is a webpage with a few examples which make simple things simple; have fun". >> >> Jena I've used a lot, and like, but ... well, see remarks about maltreated donkeys above. Sesame I've used less, but it's still a four-types-of-batteries included solution. >> >> JRDF <http://jrdf.sourceforge.net/> is I think intended to be small, but looking at its documentation, it seems to have become fuller-featured over time. Also, it's marked as 'inactive', which is nudging one away from using it for new projects. >> >> rdf2go looks attractive, and seems to be aimed in part at the same semweb-sceptical userbase. But as an abstraction layer over other triple stores, it fails my 'one jar' goal. >> >> I imagine it would be possible to try to extract some some sort of bare-bones Jena subset, but I can't help thinking that would be quite a lot of work (I haven't looked at the feasibility in any detail). >> >> Yes, disk space is cheap, and yes, I can' just write a "primer for sceptics" set of examples, but if there's a bare-bones librarylet knocking around, that I haven't found, then I'd like to use it, and I imagine the LOD list would know of it. >> >> Thanks for any pointers. >> >> All the best, >> >> Norman >> >> >> -- >> Norman Gray : http://nxg.me.uk >> SUPA School of Physics and Astronomy, University of Glasgow, UK >> >> >> > > > -- > Jean-Marc Vanel > Déductions SARL - Consulting, services, training, > Rule-based programming, Semantic Web > http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + > rules, XML, UML, eCore, Java bytecode > +33 (0)6 89 16 29 52 > chat : irc://irc.freenode.net#eulergui > -- Jean-Marc Vanel Déductions SARL - Consulting, services, training, Rule-based programming, Semantic Web http://jmvanel.free.fr/ - EulerGUI, a turntable GUI for Semantic Web + rules, XML, UML, eCore, Java bytecode +33 (0)6 89 16 29 52 chat : irc://irc.freenode.net#eulergui
Received on Monday, 12 September 2011 13:33:59 UTC