Re: Quick Poll

For properties you would need to use owl:equivalentProperty or
rdfs:subPropertyOf in either direction.

SKOS is very useful here as an alternative when the logic gets dirty due to
loose term definition.

As an example see this SKOS mapping from PAV onto Dublin Core Terms (which
are notoriously underspecified and vague):

http://www.jbiomedsem.com/content/4/1/37/table/T5

http://www.jbiomedsem.com/content/4/1/37 (Results)

Actual SKOS: http://purl.org/pav/mapping/dcterms

Here we found SKOS as a nice way to do the mapping independently (and
justified) as the inferences from OWL make DC Term incompatible with any
causal provenance ontology like PROV and PAV.
On 23 Jan 2015 17:59, "Hugh Glaser" <hugh@glasers.org> wrote:

> Thanks, and thanks for all the answers so far.
>
> > On 23 Jan 2015, at 16:23, Stian Soiland-Reyes <
> soiland-reyes@cs.manchester.ac.uk> wrote:
> >
> > Not sure where you are going, but you are probably interested in
> > linksets - as a way to package equivalence relations - typically in a
> > graph of its own.
> Thanks - I have a lot of linksets :-)
> >
> > http://www.w3.org/TR/void/#describing-linksets
> >
> >
> >
> > To answer the questions:
> >
> > Q1: d) in subject, property, object, or multiple of those.
> I don’t understand where property comes in for using owl:sameAs (or
> whatever) in stating equivalence between URIs, so I’ll read that as c)
> >
> >
> > Q2: No. We already reuse existing vocabularies and external
> > identifiers, and there could be a nested structure which is only
> > indirectly connected to "our" URIs.
> I realise that this second question wasn’t as clear as it might have been.
> What I meant was concerned with the sameAs triples only (as was explicit
> for Q1).
> So, to elaborate, if you have decided that:
> http://mysite.com/foo, http://dbpedia.org/resource/foo,
> http://rdf.freebase.com/ns/m.05195d8
> are aligned (the same), then what do the triples describing that look like?
> In particular, do you have any that look like
> <http://dbpedia.org/resource/foo> owl:sameAs <
> http://rdf.freebase.com/ns/m.05195d8> .
> (or vice versa), or do you equivalent everything to a “mysite” URI?
>
> But I guess for OpenPHACTS this doesn’t apply, since I understand from
> what you say below that you never mint a URI of your own where you know
> there is an external one.
> Although it does beg the question, perhaps, of what you do when you alter
> find equivalences.
>
> Best
> Hugh
> >
> > <http://example.com/our/own> pav:authoredBy
> > <http://orcid.org/0000-0001-9842-9718> .
> > <http://orcid.org/0000-0001-9842-9718> foaf:name "Stian Soiland-Reyes" .
> >
> > It's true you would also get the second triple from ORCID (remember
> > content negotiation!), but it's very useful for presentation and query
> > purposes to include these directly, e.g. in a VOID file.
> >
> > In most cases we do however not have any "our URIs" except for
> > provenance statements. But perhaps Open PHACTS is special in that
> > regard as we are integrating other people's datasets and shouldn't be
> > making up any data of our own. :)
> >
> >
> >
> > Perhaps also of interest:
> >
> > In the Open PHACTS project <http://www.openphacts.org/> we use this
> > extensively - we let the end-user choose which linksets of weak and
> > strong equivalences they want to apply when a query is made. Such a
> > collection of linksets and their application we call a "lense" - so
> > you apply lenses to merge/unmerge your data. See
> > http://www.slideshare.net/alasdair_gray/gray-compcoref
> >
> >
> > In our identity mapping service
> > <
> http://www.openphacts.org/about-open-phacts/how-does-open-phacts-work/identities-within-open-phacts
> >
> > we pass in several parameters - the minimal is the URI to map.
> >
> > See http://openphacts.cs.man.ac.uk:9092/QueryExpander/mapURI and use
> > http://rdf.ebi.ac.uk/resource/chembl/targetcomponent/CHEMBL_TC_2443 as
> > the URI.
> >
> >
> > We also have a piece of magic that can rewrite a SPARQL query to use
> > the mapped URIs for a given variable (adding FILTER statements) try -
> > http://openphacts.cs.man.ac.uk:9092/QueryExpander/
> >
> >
> >
> >
> > On 23 January 2015 at 11:39, Hugh Glaser <hugh@glasers.org> wrote:
> >> I would be really interested to know, please.
> >> I suggest answers by email, and I’ll report back eventually.
> >>
> >> Here goes:
> >> Imagine you have some of your own RDF using URIs on your base/domain.
> >> And you have reconciled some of your URIs against some other stuff,
> such as dbpedia, freebase, geonames...
> >> Now, visualise the owl:sameAs (or skos:whatever) triples you have made
> to represent that.
> >>
> >> Q1: Where are your URIs?
> >> a) subject, b) object, c) both
> >> Q2: Do all the triples have one of your URIs in them?
> >> a) yes, b) no
> >>
> >> It’s just for a choice I have about the input format for sameAs
> services, so I thought I would ask :-)
> >>
> >> Best
> >> Hugh
> >> --
> >> Hugh Glaser
> >>   20 Portchester Rise
> >>   Eastleigh
> >>   SO50 4QS
> >> Mobile: +44 75 9533 4155, Home: +44 23 8061 5652
> >>
> >>
> >>
> >
> >
> >
> > --
> > Stian Soiland-Reyes, eScience Lab
> > School of Computer Science
> > The University of Manchester
> > http://soiland-reyes.com/stian/work/
> http://orcid.org/0000-0001-9842-9718
> >
>
> --
> Hugh Glaser
>    20 Portchester Rise
>    Eastleigh
>    SO50 4QS
> Mobile: +44 75 9533 4155, Home: +44 23 8061 5652
>
>
>