On 3/4/13 12:27 AM, Arun Chippada wrote:
Hi Kingsley,Just wanted to get clarification if it is expected that the two endpoints (http://live.dbpedia.org/sparql and http://dbpedia-live.openlinksw.com/sparql <http://live.dbpedia.org/sparql%20and%20http://dbpedia-live.openlinksw.com/sparql>) do not always return the same set of triples for the same sparql query, for example, on a query such asCONSTRUCT {?s ?p ?o} WHERE { ?s ?p ?o. FILTER(?s = <http://dbpedia.org/resource/Silver_Linings_Playbook>) }Or is this an issue with the http://live.dbpedia.org/sparql <http://live.dbpedia.org/sparql%20> endpoint that some of the expected properties are missing?
No idea.Our endpoint isn't a 100% replica of live.dbpedia.org/sparql. They have Virtuoso as the underlying platform in common. Beyond that, there are subtle differences of the kind you are experiencing right now.
Kingsley
Thanks Arun No. They are variants of the same thing, but clearly not 100% the same. Regards, Kingsley Idehen =20 Founder & CEO=20 OpenLink Software =20 Company Web:http://www.openlinksw.com <file:///C:/Users/Arun/Downloads/3D%22http://www.openli=> Personal Weblog:http://www.openlinksw.com/blog/~kidehen <file:///C:/Users/Arun/Downloads/3D%22http://www.op=> Twitter/Identi.ca handle: @kidehen Google+ Profile:https://plus.google.com/112399767= 740508618350/about <file:///C:/Users/Arun/Downloads/3D%22https://plus.=> LinkedIn Profile:http://www.linkedin.com/in/kidehen <file:///C:/Users/Arun/Downloads/3D%22http://www.l=> ------------------------------------------------------------------------ From: [email protected] To: [email protected] CC: [email protected]Subject: RE: [Dbpedia-discussion] how to test if extraction of triples on a wikipedia page is working correctly?Date: Sun, 3 Mar 2013 14:07:49 -0800 Thanks for your reply, Dimitris.However, I was already using http://live.dbpedia.org. As I mentioned in my previous email, I found several cases where expected properties are missing, when querying using the live.dbpedia.org/sparql endpoint.For example, below I listed a few cases, where the ontology property for director is missing from live.dbpedia.orghttp://dbpedia.org/resource/Silver_Linings_Playbookhttp://dbpedia.org/resource/Gardens_of_Stone <http://dbpedia.org/resource/Silver_Linings_Playbook>http://dbpedia.org/resource/The_Terror_%281963_film%29However, the other SPARQL endpoint listed for live.dbpedia - http://dbpedia-live.openlinksw.com/sparql, does return the ontology director property for the above resources. But my understanding is that the live.dbpedia.org/sparql endpoint is more recommended, as it is based on the new Java framework. Am I right?Is there a reason why these properties are missing when querying using the live.dbpedia.org/sparql endpoint?Thanks Arun ------------------------------------------------------------------------ From: [email protected] Date: Fri, 1 Mar 2013 09:18:05 +0200Subject: Re: [Dbpedia-discussion] how to test if extraction of triples on a wikipedia page is working correctly?To: [email protected] CC: [email protected] Hi Arun,DBpedia has two 'modes' the static one, served from http://dbpedia.org and the live one served from http://live.dbpedia.org. Static DBpedia is updated once or twice a year with the latest update using data from May/June 2012 [1]The article you are looking into is created last month [2] so it does not exists at all in static dbpedia You can use the live dbpedia for that (but there are some technical problems right now so try later)For improving the framework you can use our online mapping wiki http://mappings.dbpedia.org Best, Dimitris [1] http://dbpedia.org/Downloads38[2] http://en.wikipedia.org/w/index.php?title=Silver_Linings_Playbook&action=historyOn Thu, Feb 28, 2013 at 7:36 PM, Arun Chippada <[email protected] <mailto:[email protected]>> wrote:Hi, I am seeing several cases where triples for a resource are missing when querying live.dbpedia.org <http://live.dbpedia.org>. For example, for <http://dbpedia.org/resource/Silver_Linings_Playbook>, the director property is missing (http://dbpedia.org/property/director or http://dbpedia.org/ontology/director), as observed from the results of the below sparql query CONSTRUCT {?s ?p ?o} WHERE { ?s ?p ?o. FILTER(?s = <http://dbpedia.org/resource/Silver_Linings_Playbook>) } However, I don't know the reason for the director property not being returned - 1) is it because the director property was never extracted from the Infobox on this wikipedia page and therefore it is missing from the backend triple store in live.dbpedia.org <http://live.dbpedia.org>? 2) Or is it because the director property is getting dropped somewhere in the process of the query? Is there a way in which I can test if the extraction of properties for a given wikipedia page is working correctly and expected properties are getting extracted for that page? Does this require me to install the dbpedia extraction framework (or) is there something simpler than that? Thanks Arun ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Dbpedia-discussion mailing list [email protected] <mailto:[email protected]> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion -- Kontokostas Dimitris ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
-- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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