hmmm... when I posted "You'll have to invest a lot of time to use the
right vocabularies (a) and right (external) URIs (b) to expose the
right things (c)." earlier...
what about (c)?
I think there are publishers like the BBC, who have clear incentives -
their business is to record things happing, logging history, not only
about daily politics, economy, etc. but also culture, music, films,
etc...
Well, DBpedia is also clear. This is the big hub, the reference for
many terms. It gives you all kind of entities, well described, clear
meaning (best at least what you can do, some disambiguation issues
will always remain).
Then there are several other datasets with public data. Many of the
projects behind them are publicly funded or by research grants. So
there may be many individual inventives also of single persons and
research groups.
What else?
regards,
AndyL
On Feb 9, 2009, at 4:03 PM, Kurt J 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.
What is out there to explain the incentives?
-kurt
On Mon, Feb 9, 2009 at 2:49 PM, Andreas Langegger <[email protected]> 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
tel: +44 (0)870 400 5000
fax: +44 (0)870 400 5001
mobile: +44 (0)7971 475 257
msn: [email protected]
irc: irc.freenode.net/mmmmmrob,isnick
web: http://www.talis.com/
blog: http://www.dynamicorange.com/blog/
blog: http://blogs.talis.com/panlibus/
blog: http://blogs.talis.com/nodalities/
blog: http://blogs.talis.com/n2/
Please consider the environment before printing this email.
Find out more about Talis at www.talis.com
shared innovationTM
Any views or personal opinions expressed within this email may not
be
those of Talis Information Ltd or its employees. The content of
this email
message and any files that may be attached are confidential, and
for the
usage of the intended recipient only. If you are not the intended
recipient,
then please return this message to the sender and delete it. Any
use of this
e-mail by an unauthorised recipient is prohibited.
Talis Information Ltd is a member of the Talis Group of companies
and is
registered in England No 3638278 with its registered office at
Knights
Court, Solihull Parkway, Birmingham Business Park, B37 7YB.
http://www.langegger.at
----------------------------------------------------------------------
Dipl.-Ing.(FH) Andreas Langegger
Institute for Applied Knowledge Processing
Johannes Kepler University Linz
A-4040 Linz, Altenberger Straße 69
http://www.langegger.at
----------------------------------------------------------------------
Dipl.-Ing.(FH) Andreas Langegger
Institute for Applied Knowledge Processing
Johannes Kepler University Linz
A-4040 Linz, Altenberger Straße 69
