On 9/10/14 10:35 AM, Dimitris Kontokostas wrote:
Hi Kingsley,It would be good to know how you did this so that we can deploy this on all chapters.Ideally this could go directly into the dbpedia-vad init script https://github.com/dbpedia/dbpedia-vad-i18n Best, DimitrisOn Wed, Sep 10, 2014 at 5:00 PM, Kingsley Idehen <kide...@openlinksw.com <mailto:kide...@openlinksw.com>> wrote:On 9/10/14 7:47 AM, Kingsley Idehen wrote: On 9/10/14 6:01 AM, Bernard Vatant wrote: Hi all Following an off-list answer to Kingsley on the G+ LOV community conversation [1] - The current state of affair needs to follow the ov:defines predicates in the ontology description to each of its elements to get the full description of the ontology content (classes and propertie). I tried to replace those by owl:imports predicates and submit the file to Protégé, but after more than one hour it was still struggling with importing the 3480 elements from their URI, with so many queries on DBpedia servers. Cleraly not the good solution. - So I tried otherwise, sending to the SPARQL endpoint this very basic query. CONSTRUCT {?s ?p ?o} WHERE { ?s rdfs:isDefinedBy <http://dbpedia.org/ontology/>. ?s ?p ?o} This is a compact URI for this query result (in RDF/XML) http://bit.ly/1xHzpv5 which I successfully submitted to either Protégé or the LOV-Bot. So, seems to me if the ontology namespace had a conneg to such a query it would be all we need. Or, if you keep the things as they are, we will take internally in LOV such a URI to feed the LOV-Bot. [1] https://plus.google.com/+BernardVatant/posts/jVVSVbxuDfq Bernard, Alternatively, we can implement the following, which basically leverages the much underutilized <http://www.w3.org/2007/05/powder-s#describedby> relation as a mechanism for incorporating an external (outside quad store) ontology terms description document into the DBpedia Ontology description: ## DBpedia Ontology Fix # Ontology IRI: <http://dbpedia.org/ontology/> # Named Graph IRI: <http://dbpedia.org/ontology/definitions#> # Ontology Definitions Document URLs: <http://dbpedia.org/ontology/data/definitions.ttl>, # <http://dbpedia.org/ontology/data/definitions.jsonld>, etc.. # URL Re-write rule: # for all lookups requests for: <http://dbpedia.org/ontology/> # resolve to (subject to Accept: headers), a SPARQL URL for: # DESCRIBE <http://dbpedia.org/ontology/> FROM <http://dbpedia.org/ontology/definitions#> # # HTTP/WebDAV accessible Docs, generated by internal indirection of SPARQL DESCRIBE or CONSTRUCT: # <http://dbpedia.org/ontology/data/definitions.ttl>, # <http://dbpedia.org/ontology/data/definitions.jsonld>, etc.. INSERT {GRAPH <http://dbpedia.org/ontology/definitions#> { ?s rdfs:isDefinedBy <http://dbpedia.org/ontology/>. <http://dbpedia.org/ontology/> <http://open.vocab.org/terms/defines> ?s. <http://dbpedia.org/ontology/> a owl:Ontology . ?s <http://www.w3.org/2007/05/powder-s#describedby> <http://dbpedia.org/ontology/data/definitions.ttl> . <http://dbpedia.org/ontology/dqta/definitions.ttl> <http://open.vocab.org/terms/describes> ?s . } } WHERE {GRAPH <http://dbpedia.org/ontology/definitions#> { {?s rdfs:subClassOf ?o} UNION {?s rdfs:subPropertyOf ?o} UNION {?s owl:equivalentClass ?o} UNION {?s owl:equivalentProperty ?o} UNION {?s a ?o} } } ETA for this going live: next 20 - 60 minutes. Kingsley Bernard, Done. You can now lookup <http://dbpedia.org/ontology/> and retrieve the entire DBpedia ontology, in your preferred document type.
Dimitri and others interested in this matter,Note: for DBpedia distros, we've added this to the VAD, so when you run the Virtuoso VAD it just works.
Breaking down:1. Extracted DBpedia Ontology from download archive and uploaded to a Virtuoso HTTP/WebDAV/LDP collection (folder)
2. Loaded DBpedia ontology triples from download archive into a Virtuoso Named Graph identified by <http://dbpedia.org/ontology/definitions#> -- this could also have been achieved using a Linked Data Import or RDF Sink folder which has a two-for-one effect i.e., you have the HTTP/WebDAV/LDP resource and an actual load of document content into a Virtuoso quad store named graph all happen via a single copy-to-folder action
3. Using the SPARQL 1.1 query above (which is scoped to named graph <http://dbpedia.org/ontology/definitions#>) generate missing rdfs:isDefinedBy, wdrs:describedBy relations that handle
-- Assigning Ontology its on HTTP URI <http://dbpedia.org/ontology/>
-- association of Ontology with the Classes and Properties that it
defines using rdfs:isDefinedBy
-- association of Ontology, Classes, and Properties with an
HTTP/WebDAV accessible Ontology document (identified by its document
URI/URL) using wdrs:describedby
4. Using SPARQL CONSTRUCT with different data representation options to generate JSON-LD and XML (as in RDF/XML) variants of the TURTLE based Ontology document
5. Adjusted URL re-write rules accordingly re., /ontology/ pattern. Verify using: curl -I http://dbpedia.org/ontology/data/definitions.ttl HTTP/1.1 200 OK Date: Wed, 10 Sep 2014 17:07:07 GMT Content-Type: text/turtle Content-Length: 2152556 Connection: keep-alive Server: Virtuoso/07.10.3211 (Linux) x86_64-redhat-linux-gnu VDB ETag: "cdeaaca054eab36ecd7365bda7902cde"Link: <http://dbpedia.org/DAV/VAD/dbpedia/ontology/definitions.ttl,meta>; rel="meta"; title="Metadata File" Link: <http://dbpedia.org/DAV/VAD/dbpedia/ontology/definitions.ttl,acl>; rel="acl"; title="Access Control File"
Accept-Ranges: bytes -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog 1: http://kidehen.blogspot.com Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen Twitter Profile: https://twitter.com/kidehen Google+ Profile: https://plus.google.com/+KingsleyIdehen/about LinkedIn Profile: http://www.linkedin.com/in/kidehen Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this
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