Re: [foaf-dev] Fwd: A Round of TinkerPop Stack Releases

On 9 May 2011 10:41, Dan Brickley <[email protected]> wrote:
> For those keeping an eye on TinkerPop (and Gremlin and related tools),
> ie. http://www.tinkerpop.com/ they've just released a 1.0.
>
> To get a flavour of what it does, check out
> http://www.slideshare.net/slidarko/the-gremlin-in-the-graph
> or http://markorodriguez.com/services/development/recommendation-system/

Interesting.

I think this may be different to RDF Graphs in that you can annotate
the edges.  I saw A knows B (since=2007) in one slide.  You cant
easily do that in RDF without reification.

So that makes it more a "network" than a "graph".  (Similar to a
Geometry vs a Topology)

There's a whole other field of problem you can solve with this
technology, e.g. travelling salesman, Dijkstra's algorithm etc.

>
> The Gremlin language is interesting, especially when mixed with the
> Sesame Linked Data Sail component which reads RDF from the Web as you
> explore it. It's a bit like an RDF path language, except you can drop
> down to code (Java/Groovy) at each traversal point...
>
> Here's something to try:
>
> sh gremlin.sh
>
>         \,,,/
>         (o o)
> -----oOOo-(_)-oOOo-----
> gremlin> load stephenfry.txt
>
> where that file contains:
>
> g = new LinkedDataSailGraph(new MemoryStoreSailGraph())
> com.tinkerpop.gremlin.loaders.SailGraphLoader.load()
> v = g.v('http://dbpedia.org/resource/Stephen_Fry')
> g.addNamespace('dbpedia','http://dbpedia.org/resource/')
> g.addNamespace('dbpedia-owl', 'http://dbpedia.org/ontology/')
> labels = [g.uri('dbpedia-owl:presenter'),
> g.uri('dbpedia-owl:creator'), g.uri('dbpedia-owl:influences'),
> g.uri('dbpedia-owl:starring'),g.uri('dbpedia-owl:writer'),
> g.uri('owl:sameAs') ]
> rand = new Random()
> m = [:]
> v.bothE{labels.contains(it.label) & rand.nextBoolean()
> }.outV.groupCount(m).loop(4){it.loops < 4}
> m.subMap((m.keySet() as List)[0..10])
>
> // ...or you might try
> gremlin> v.inE('dbpedia-owl:starring').outV.outE('dbpedia-owl:starring').inV.groupCount(m).loop(5){
> it.loops < 3 }
> gremlin> m2 = m.sort{ a,b -> b.value <=> a.value }
> gremlin> m2.subMap((m2.keySet() as List)[0..50])
>
> ...to poke around the graph. Results to this last one:
>
> ==>v[http://dbpedia.org/resource/Stephen_Fry]=8152
> ==>v[http://dbpedia.org/resource/Hugh_Laurie]=3641
> ==>v[http://dbpedia.org/resource/Rowan_Atkinson]=2481
> ==>v[http://dbpedia.org/resource/Tony_Robinson]=2168
> ==>v[http://dbpedia.org/resource/Miranda_Richardson]=1793
> ==>v[http://dbpedia.org/resource/Tim_McInnerny]=1398
> ==>v[http://dbpedia.org/resource/Robbie_Coltrane]=1301
> ==>v[http://dbpedia.org/resource/Emma_Thompson]=1294
> ==>v[http://dbpedia.org/resource/Tony_Slattery]=911
> ==>v[http://dbpedia.org/resource/Colin_Firth]=834
> ==>v[http://dbpedia.org/resource/John_Lithgow]=729
>
> ...what I like about this style of graph access is that it is somehow
> less fragile/brittle/precise than SPARQL, and so can deal a bit better
> with the chaotic nature of sources like Wikipedia and the Web at
> large. Obviously SPARQL has a role too, seems quite complementary to
> me.
>
> Dan
>
> ---------- Forwarded message ----------
> From: Marko Rodriguez <[email protected]>
> Date: 9 May 2011 01:41
> Subject: A Round of TinkerPop Stack Releases
> To: gremlin-users-/[email protected]
>
>
> Hello everyone,
> This marks a big day for TinkerPop. We are releasing Gremlin 1.0 (its
> been 1.5 years in the making) and Rexster 0.3 (a solid, powerful graph
> server). Along with these milestones, comes a round of other releases.
> Blueprints 0.7 (Patrick):
> https://github.com/tinkerpop/blueprints/wiki/Release-Notes
> Pipes 0.5 (Drain): https://github.com/tinkerpop/pipes/wiki/Release-Notes
> Frames 0.2 (Huff and Puff):
> https://github.com/tinkerpop/frames/wiki/Release-Notes
> Gremlin 1.0 (Gremlin): https://github.com/tinkerpop/gremlin/wiki/Release-Notes
> Rexster 0.3 (Dog Eat Dog):
> https://github.com/tinkerpop/rexster/wiki/Release-Notes
> All these releases are in the TinkerPop Maven2 repository and uploaded
> to and tagged in GitHub.
> Thank you to all the TinkerPop contributors, the users, and
> please---enjoy the software.
> Marko.
> http://markorodriguez.com
> http://tinkerpop.com
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