Hi Dimitris, On Tue, Sep 29, 2015 at 10:52 AM, Dimitris Kontokostas <jimk...@gmail.com> wrote:
> The datatypes are exported automatically from code [1] and we currently > support only the existing high level declaration only. > I see. A generic solution would be to define the currencies as narrowings of `xsd:decimal' and the measurements as narrowings of `xsd:float'. I'll suggestion something along those lines in the issue tracker. > If this is needed, we are open to suggestions or direct PRs > What's a PR? > I suggest you open up a new issue on this in the ontology tracker and > continue the discussion there > I will do so. Thanks again! --- Best regards, Wouter Beek. Email: w.g.j.b...@vu.nl WWW: wouterbeek.com Tel: +31647674624 On Tue, Sep 29, 2015 at 10:52 AM, Dimitris Kontokostas <jimk...@gmail.com> wrote: > > > On Wed, Sep 23, 2015 at 12:29 PM, Wouter Beek <m...@wouterbeek.com> wrote: > >> Hi Dimitris, >> >> Thanks a lot for the pointers so far and thanks for solving the >> *dereference* issue! However, I am still not able to find a >> specification of the *mappings* of the DBpedia datatypes. I will >> explain a bit more about what this means since we seem to be talking about >> slightly different things here. >> >> According to the RDF 1.1 specification >> <http://www.w3.org/TR/rdf11-concepts/#section-Datatypes>: "A datatype >> consists of a lexical space >> <http://www.w3.org/TR/rdf11-concepts/#dfn-lexical-space>, a value space >> <http://www.w3.org/TR/rdf11-concepts/#dfn-value-space> and a lexical-to-value >> mapping >> <http://www.w3.org/TR/rdf11-concepts/#dfn-lexical-to-value-mapping> >> [...]" >> >> I am looking for these mappings for, e.g., datatype http://dbpedia >> .org/datatype/inhabitantsPerSquareKilometre. My first attempt was to >> dereference these IRIs and maybe find a specification of the mappings >> there. Now that these IRIs can be dereferenced (thanks for fixing this!), >> the dereference does not seem to contain (a links to) a specification of >> these mappings. >> >> A concrete example of a datatype IRI that *does* provide these mappings >> in accordance with the RDF 1.1 specification is `xsd:gMonthDay`. If you >> dereference the following IRI you receive (a link to) a specification of >> the mappings: http://www.w3.org/2001/XMLSchema#gMonthDay. These >> mappings can be implemented by software in order to correctly interpret >> 〈xsd:gMonthDay,"06-12"〉 which number denotes the month and which number >> denotes the day. >> >> The mappings are important since, e.g., 〈`dbp:centimetre`,1.0〉 may be >> defined as `xsd:float` and a 〈`dbp:usDollar`,1.0〉 may be defined as >> `xsd:decimal` (and float 1.0 ≠ decimal 1.0). In other words, the way in >> which the DBpedia datatypes are defined (preferably in terms of XSD) is >> important in order to determine the meaning of literals in which DBpedia >> datatypes appear. >> >> Hope this makes my initial question a bit clearer! >> > > Hi Wooter, > > Yes it does but currently we do not have such definitions. The datatypes > are exported automatically from code [1] and we currently support only the > existing high level declaration only. > If this is needed, we are open to suggestions or direct PRs > I suggest you open up a new issue on this in the ontology tracker and > continue the discussion there > > Cheers, > Dimtiris > > > [1] > https://github.com/dbpedia/extraction-framework/blob/master/core/src/main/scala/org/dbpedia/extraction/ontology/OntologyDatatypes.scala > > >> >> --- >> Cheers >> , >> Wouter. >> >> Email: m...@wouterbeek.com >> WWW: wouterbeek.com >> Tel: +31647674624 >> > > > > -- > Kontokostas Dimitris >
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