- From: Danny Ayers <danny.ayers@gmail.com>
- Date: Mon, 24 Dec 2007 14:36:31 +0100
- To: editor@content-wire.com
- Cc: semantic-web@w3c.org
On 23/12/2007, editor@content-wire.com <editor@content-wire.com> wrote: > Most of the conceptual thinking behind semantic data was done in the > eighties > Things have moved on a little in the last ten years or so, but not so much ...if you discount Semantic Web technologies ;-) > questions: > > - other than SIM, prototypes like Hstore and some semantic data wrapper, > what tools can I use to implement semantic data? Correct me if I'm wrong, but I think the original notion of semantic data was the overlay of ontology kind of ideas over an entity-relationship kind of model. There's been a great deal of work done since around Description Logics (which offer formalisations of ontologies) and the Resource Description Framework offers an entity-relationship model designed for the Web. Put these together, with a few other bits and pieces and you have Semantic Web technologies. > - when modelling data, usually we follow standard 'data modelling' methods > based on relational data model. what parts of our methods do we have to > upldate to develop semantic data model? Depends how semantic you want to get. Down at the RDF level, you can just normalise the data down to binary relations (and name the relations with URIs). This can be done as a view of the relational data. The SPARQL query language can be used on such data, and because of the use of URIs as identifiers it's inherently Web-friendly. If you want more sophisticated reasoning over the data, you'll need to find or create OWL ontologies in which your data fits. > - As a project manager in charge of making sure that my organisation's data > model is 'semantic enabled' what should I absolutely make sure of? Depends what you want to do with the data. I'd suggest exposing an RDF view of the data, reusing existing RDF schemas/ontologies wherever possible. See the specs listed at: http://www.w3.org/2001/sw/ also: http://sites.wiwiss.fu-berlin.de/suhl/bizer/pub/LinkedDataTutorial/ To make it useful internally, you may want to check out some of the available tools, e.g. at: http://www.mkbergman.com/?page_id=325 http://sites.wiwiss.fu-berlin.de/suhl/bizer/toolkits/ http://planetrdf.com/guide/ Cheers, Danny. -- http://dannyayers.com
Received on Monday, 24 December 2007 13:41:08 UTC