[Virtuoso-users] VOS develop/7 returns string instead of URI with ORDER BY

Hi, With the latest develop/7 sources (commit 8dc86c42) and under OS/X 10.6.8, string literals, instead of URIs, are returned from SPARQL queries. The query: SELECT * FROM WHERE { ?s a ?t } returns rows in the form: result: [s=uri

Re: [Virtuoso-users] Data Integrity in RDF?

I agree that it’s much practical to do validation and data cleaning to RDF data before you run queries rather than after. If your data is clean, you can easily write SPARQL queries that do everything people do with SQL queries and then some. If you do your data cleaning in a distinct post-pro

Re: [Virtuoso-users] Fwd: Data Integrity in RDF?

On 4/22/13 6:16 PM, Matías Parodi wrote: Is there a way to specify such constraints in Virtuoso? I read Virtuoso ORDBMS support it, but what about RDF? Does it support SPIN (http://spinrdf.org/)? SPIN support is planned. Ditto SPARQL Views (where by SPARQL itself surfaces as a rule and integrit

Re: [Virtuoso-users] Data Integrity in RDF?

On 24.04.2013, at 19:24, Matías Parodi wrote: > There is this project called SPIN (spingrdf.org) which lets you add > constraints that are checked when you insert new data into the store. In this > way, as I see it, you're not "blocking the data-flow". Whatever gets into the > store is "valid

Re: [Virtuoso-users] Data Integrity in RDF?

There is this project called SPIN (spingrdf.org) which lets you add constraints that are checked when you insert new data into the store. In this way, as I see it, you're not "blocking the data-flow". Whatever gets into the store is "valid", and the inferences are done in the same way (there's no d

Re: [Virtuoso-users] Data Integrity in RDF?

On 24.04.2013, at 19:04, Matías Parodi wrote: > Any idea about forcing constraints in Virtuoso? well… my personal belief is, that constraints should be enforced on application level RDF is good because it allows you to store and exchange opaque-but-introspectable data Application, on the oth

Re: [Virtuoso-users] Data Integrity in RDF?

Tripod is awesome, thank you! Any idea about forcing constraints in Virtuoso? On Mon, Apr 22, 2013 at 7:51 PM, Alexey Zakhlestin wrote: > On 23.04.2013, at 2:16, Matías Parodi wrote: > > > By the way, what is the best way to use Virtuoso from Ruby on Rails? I > think there isn't any ActiveReco

[Virtuoso-users] Problem with Virtuoso for a local DBpedia

Hi, I think I have badly configured my Virtuoso for my local dbpedia extraction because it's impossible for me to have the dereferenced links. By example : http://data.lirmm.fr/page/Toulouse I create a proxy via Apache for the port 80. As you can see nothing is displayed :-( All my URIs start b