Re: please read before participating in translation scheme debate [Re: Translating DB values to RDF terms using 1) R2RML views and 2) using R2RML-native translation scheme]

On Wed, Dec 14, 2011 at 1:47 PM, Richard Cyganiak <richard@cyganiak.de>wrote:

> Hi Souri,
>
> On 14 Dec 2011, at 16:05, Souripriya Das wrote:
> > We have made the examples in this page more complete.
> >
> >
> http://www.w3.org/2001/sw/rdb2rdf/wiki/Translating_Database_Values_to_RDF_Terms
> >
> > Please read it if you get a chance.
>
> I did, but I'm not sure that I grasp the point. Are you saying that
> translation tables can be written as R2RML views without too much effort
> and hence are not needed in R2RML 1.0?
>

Maybe :)

But it would be an "ugly" sql query. However, if you are a db guy, you may
be more comfortable writing SQL than learning R2RML. If you are a semweb
guy, then you would be comfortable with the translation tables in R2RML.
Therefore, I believe that we need to have translation tables.

Comparing both proposals:

Souri:

x:myTranslationScheme rr:translationMap
  [ rr:toTerm <http://www.nyc.gov> ;            rr:fromTerm <
http://www.city.New%20York.NY.us> ] ;
  [ rr:toTerm <http://www.cityofboston.gov> ;   rr:fromTerm <
http://www.city.Boston.MA.us> ] ;
  [ rr:toTerm <http://www.atlantaga.gov> ;      rr:fromTerm <
http://www.city.Atlanta.GA.us> ] ;
  [ rr:toTerm <http://www.miamigov.com> ;       rr:fromTerm <
http://www.city.Miami.FL.us> ] ;
  [ rr:toTerm <http://www.dallascityhall.com> ; rr:fromTerm <
http://www.city.Dallas.TX.us> ] ;
  [ rr:toTerm <http://www.lacity.org> ;         rr:fromTerm <
http://www.city.Los%20Angeles.CA.us> ] ;
  [ rr:toTerm <http://www.sfgov.org> ;          rr:fromTerm <
http://www.city.San%20Francisco.CA.us> ] ;
  [ rr:toTerm <http://www.seattle.gov> ;        rr:fromTerm <
http://www.city.Seattle.WA.us> ] ;
  [ rr:toTerm <http://www.cityofchicago.org> ;  rr:fromTerm <
http://www.city.Chicago.IL.us> ] .

Richard:

  []  skos:inScheme x:myTranslationScheme;
      skos:notation <http://www.city.New%20York.NY.us>;
      skos:exactMatch <http://www.nyc.gov>.

  []  skos:inScheme x:myTranslationScheme;
      skos:notation <http://www.city.Boston.MA.us>;
      skos:exactMatch <http://www.cityofboston.gov>.

.....

So basically

rr:translationMap ~= skos:inScheme
rr:fromTerm = skos:notation
rr:toTerm = skos:exactMatch


Souri's proposal would avoid the following repetitive triple

[]  skos:inScheme x:myTranslationScheme;

Am I missing something else?



> Best,
> Richard
>