- From: Magnus Knuth <magnus.knuth@hpi.uni-potsdam.de>
- Date: Thu, 17 Sep 2015 16:04:24 +0200
- To: Marco Fossati <hell.j.fox@gmail.com>
- CC: <public-lod@w3.org>, dbpedia-discussion <dbpedia-discussion@lists.sourceforge.net>
One structural problem I recognized when seeing the approach [http://jens-lehmann.org/files/2015/semantics_dbtax.pdf], is that there is in most (non-complex) categories an article having exactly the same name, e.g. dbr:President dc:subject dbc:President. And indeed these resources are typed accordingly, e.g. http://it.dbpedia.org/resource/Presidente is a dbtax:President and http://it.dbpedia.org/resource/Pagoda is dbtax:Pagoda. A type coverage of more than 99 percent is very suspicious, because I’d expect much more resources in DBpedia not type-able. Why? A lot of articles in DBpedia describe very abstract concepts, e.g. Liberty, Nationality, Social_inequality (well, you have the class dbtax:Concept, but what is on the other hand not a concept?), or they describe classes by their selves, e.g. President, Country, Person, Plane (well, you have the class dbtax:Classification, but it is not used as such [http://it.dbpedia.org/sparql?default-graph-uri=&query=SELECT+*+%7B%3Fres+a+%3Chttp%3A%2F%2Fdbpedia.org%2Fdbtax%2FClassification%3E%7D&format=text%2Fhtml&debug=on]). For some articles it is arguable whether they are instance or class, e.g. Volkswagen_Polo, Horse. I see that the classes you extracted are truly valuable for enriching the DBpedia ontology, but it obviously needs some tidy up and disambiguate efforts. Best regards and thanks for this work. Magnus Am 07.09.2015 um 15:33 schrieb Marco Fossati <hell.j.fox@gmail.com>: > Hi Vladimir and thanks for the feedback! > > On 9/7/15 2:57 PM, Vladimir Alexiev wrote: >> Hi Marco! >> >> A couple of questions about DBtax: >> - could you publish the ontology in a resolvable way? >> E.g. http://it.dbpedia.org/resource/Bitcoin/html has rdf:type http://dbpedia.org/dbtax/Term but that doesn’t resolve. > Sure, it's in the list of things to be done. >> - are there definitions of the classes? > Since DBTax is an automatic approach, it is difficult to automatically > generate human-readable definitions. > I believe this can be crowdsourced to the DBpedia mappings wiki, what fo > you think? >> E.g. Bitcoin has these classes, but I think those marked with !! are wrong and those with ?? are hard to tell before we have a definition for them >> dbtax: Page !! >> dbtax: Article !! >> dbtax: Protocol >> dbtax: Communication >> dbtax: Term ?? >> dbtax: Payment >> >> Also looking in http://it.dbpedia.org/downloads/dbtax/T-Box.ttl, it's hard to tell what these mean: >> >> dbtax:Center rdfs:label "Center"@en ; rdfs:subClassOf dbtax:Art . >> dbtax:Pagoda rdfs:label "Pagoda"@en ; rdfs:subClassOf dbtax:Art . >> dbtax:Term rdfs:label "Term"@en ; rdfs:subClassOf dbtax:Art . >> >> Cheers! >> > Cheers, > -- > Marco Fossati > http://about.me/marco.fossati > Twitter: @hjfocs > Skype: hell_j > > ------------------------------------------------------------------------------ > _______________________________________________ > Dbpedia-discussion mailing list > Dbpedia-discussion@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion -- Magnus Knuth Hasso-Plattner-Institut für Softwaresystemtechnik GmbH Prof.-Dr.-Helmert-Str. 2-3 14482 Potsdam Amtsgericht Potsdam, HRB 12184 Geschäftsführung: Prof. Dr. Christoph Meinel tel: +49 331 5509 547 email: magnus.knuth@hpi.de web: http://www.hpi.de/ webID: http://magnus.13mm.de/
Received on Thursday, 17 September 2015 14:04:52 UTC