Re: Semantic Web pneumonia and the Linked Data flu (was: Can we lower the LD entry cost please (part 1)?)

On Mon, Feb 9, 2009 at 9:03 AM, Kurt J <kurtjx@gmail.com> wrote:

>
> Hi List,
>
> IMHO, the discussion about incentives v. costs is really interesting.
> Publishing linked data is getting easier as better tools become
> available.  As a relative new comer, i can already get a sense about
> this.  But maybe we need to be more clear about the incentives.  I'm
> not sure if this means more/better evangelist style documents or maybe
> it means some killer end-user app or some combination.

Both! More evangelism and more killer apps. Problem of the killer apps, is
that it's not easy to do, hence no killer app as arrived. [1].

[1] http://twitter.com/jahendler/statuses/1177039105

>
>
> What is out there to explain the incentives?


Evangelize and create easy tools to consume linked data. I evangelize by
outreach (semanticwebaustin.org) and creating easy tools to consume linked
data (squin.org)

>
>
> -kurt
>
> On Mon, Feb 9, 2009 at 2:49 PM, Andreas Langegger <al@jku.at> wrote:
> >
> >> It seems to me that the data in an rdbms is often structured in ways
> that
> >> are designed to be efficient for the rdbms to manage rather than in ways
> >> that make sense externally. Levels of normalisation are the main thing
> I'm
> >> thinking of. LD is most widely useful at 5th Normal Form, but then there
> are
> >> tradeoffs that usually lead to an rdbms schema being more like 3NF.
> >
> > I also think that this is the most crucial point. We can always say,
> well,
> > it's easy, you just need to do this and that. But then comes the details.
> > But on the other hand, you can do very complex mappings with D2R already
> to
> > solve this. The only thing is lack of performance if you have many
> obscure
> > mappings for a larger data set!
> >
> >> Isn't the effort in publishing LD the same effort that one expends
> getting
> >> the data from the rdbms into HTML today, but that the data needs to be
> in
> >> RDF? When doing that don't tradeoffs in the schema have to be reconciled
> >> through queries that join from several tables or that select distinct
> >> entries in particular columns? Isn't that what Drupal and Ruby-n-Rails
> and
> >> so on are optimised to do?
> >>
> >> I agree with the notion of lowering the barrier and Virtuoso's mapping
> >> stuff is really interesting, but is the cost really that high right now?
> >> Isn't it just the same as writing some dynamic web pages?
> >
> > I think it depends if you just want to provide some RDFa pages, or if you
> > want to provide SPARQL. In the second case, you have to do a formalized
> > mapping (e.g. with d2rq map or Virtuoso RDF views)
> >
> >
> >
> >
> >>
> >>
> >> rob
> >>
> >>
> >> Rob Styles
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> > ----------------------------------------------------------------------
> > Dipl.-Ing.(FH) Andreas Langegger
> > Institute for Applied Knowledge Processing
> > Johannes Kepler University Linz
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