- From: Fogarolli Angela <afogarol@disi.unitn.it>
- Date: Fri, 15 Jan 2010 09:31:40 +0100
- To: ashok.malhotra@oracle.com
- Cc: Juan Sequeda <juanfederico@gmail.com>, Michael Hausenblas <michael.hausenblas@deri.org>, RDB2RDF WG <public-rdb2rdf-wg@w3.org>
Hi Juan, a URI in Linked Data principles must be dereferenciable. Your example was good for "Breakfast at Tiffany's" you can use the dbpedia URI http://dbpedia.org/resource/Breakfast_at_Tiffany%27s_%28film%29 or an OKKAM Id for Breakfast at Tiffany's. If a "Breakfast at Tiffany's" OKKAM id does not exist you can create it and then use it. The advantage of creating an OKKAM profile for "Breakfast at Tiffany's" is that you can refer to other sources where the entity has been described for example in other knowledge bases (ex. dbpedia) or other sources (ex. your database). This can be done by setting a field called alternative ID in the OKKAM profile which point for example to http://dbpedia.org/resource/Breakfast_at_Tiffany%27s_%28film%29 or to your LegacydbName/tableName/ColumnName. You can set as many alternativeID as you like. In this way it's possible to aggregate data which come from different sources through a OKKAM id. If you are interested I can tell you more about the process about how to automatically create an entity profile for an entity contained in a record....(many entities can be contained in a record...). Best, Angela. On Fri, Jan 15, 2010 at 1:39 AM, ashok malhotra <ashok.malhotra@oracle.com> wrote: > I thought you meant to ask what OKKAM does. In general, there are many > different requirements > on creating URIs for linked data. I think R2RML should allow users to write > a function to generate URIs > All the best, Ashok > > > Juan Sequeda wrote: >> >> not necessarily, doesn't D2R use the primary key value? film/1.. film/2 >> ... etc? >> >> Is it important to discuss how URIs for RDB2RDF should be created? Does it >> even matter? >> >> Juan Sequeda, Ph.D Student >> Dept. of Computer Sciences >> The University of Texas at Austin >> www.juansequeda.com <http://www.juansequeda.com> >> www.semanticwebaustin.org <http://www.semanticwebaustin.org> >> >> >> On Thu, Jan 14, 2010 at 7:10 PM, ashok malhotra <ashok.malhotra@oracle.com >> <mailto:ashok.malhotra@oracle.com>> wrote: >> >> Hi Juan: >> IIRC, the identifier would include neither the name of the movie >> nor the name of the actress. >> The end of the URL would be a UUID, i.e a 128-bit number. >> All the best, Ashok >> >> >> Juan Sequeda wrote: >> >> Michael and all, >> >> I have a question about reusable identifiers. >> >> If I have my movie rental company relational database and I >> want to expose it all as Linked Data. What should be the >> identifier for "Breakfast at Tiffany's?" >> >> http://dbpedia.org/resource/Breakfast_at_Tiffany%27s_%28film%29 >> http://data.linkedmdb.org/resource/film/71 >> okkam identifier for Breakfast at Tiffany's (if it exists) >> >> or should it be a >> http://myrentalstore.com/resource/film/123 owl:samesAs >> http://dbpedia.org/resource/Breakfast_at_Tiffany%27s_%28film%29 >> >> Audrey Hepburn, can be considered a well known entity with >> URIs in dbpedia, freebase, etc. We know that Audrey Hepburn >> acted in Breakfast at Tiffany's. So should I have my own URI >> for the movie and reuse an identifier for Audrey Hepburn? >> >> I agree that we need to offer the possibility in the language >> to reuse the identifiers, I'm just wondering what is the use case. >> >> >> >> Juan Sequeda, Ph.D Student >> Dept. of Computer Sciences >> The University of Texas at Austin >> www.juansequeda.com <http://www.juansequeda.com> >> <http://www.juansequeda.com> >> www.semanticwebaustin.org <http://www.semanticwebaustin.org> >> <http://www.semanticwebaustin.org> >> >> >> >> On Thu, Jan 14, 2010 at 5:48 AM, Michael Hausenblas >> <michael.hausenblas@deri.org >> <mailto:michael.hausenblas@deri.org> >> <mailto:michael.hausenblas@deri.org >> <mailto:michael.hausenblas@deri.org>>> wrote: >> >> >> All, >> >> I've put my initial thoughts re the Linked Data aspects of >> R2RML >> on our Wiki >> [1]. Please read, review & comment (preferably in the Wiki; >> saves >> us all >> time ;). >> >> Note that this will be the main discussion point for our >> upcoming >> telco on >> 2010-01-19. >> >> Cheers, >> Michael >> >> [1] http://www.w3.org/2001/sw/rdb2rdf/wiki/LinkedDataAspects >> >> -- >> Dr. Michael Hausenblas >> LiDRC - Linked Data Research Centre >> DERI - Digital Enterprise Research Institute >> NUIG - National University of Ireland, Galway >> Ireland, Europe >> Tel. +353 91 495730 >> http://linkeddata.deri.ie/ >> http://sw-app.org/about.html >> >> >> >> >> >
Received on Friday, 15 January 2010 08:32:13 UTC