On 11/24/10 7:47 AM, William Waites wrote:
Friedrich, I'm forwarding your message to one of the W3 lists.
Some of your questions could be easily answered (e.g. for euro in your
context, you don't have a predicate for that, you have an Observation
with units of a currency and you could take the currency from
dbpedia, the predicate is "units").
But I think your concerns are quite valid generally and your
experience reflects that of most web site developers that encounter
RDF.
LOD list, Friedrich is a clueful developer, responsible for
http://bund.offenerhaushalt.de/ amongst other things. What can we
learn from this? How do we make this better?
-w
----- Forwarded message from Friedrich Lindenberg<friedr...@pudo.org> -----
From: Friedrich Lindenberg<friedr...@pudo.org>
Date: Wed, 24 Nov 2010 11:56:20 +0100
Message-Id:<a9089567-6107-4b43-b442-d09dcc0c3...@pudo.org>
To: wdmmg-discuss<wdmmg-disc...@lists.okfn.org>
Subject: [wdmmg-discuss] Failed to port datastore to RDF, will go Mongo
(reposting to list):
Hi all,
As an action from OGDCamp, Rufus and I agreed that we should resume porting
WDMMG to RDF in order to make the data model more flexible and to allow a
merger between WDMMG, OffenerHaushalt and similar other projects.
After a few days, I'm now over the whole idea of porting WDMMG to RDF. Having
written a long technical pro/con email before (that I assume contained nothing
you don't already know), I think the net effect of using RDF would be the
following:
* Lots of coolness, sucking up to linked data people.
* Further research regarding knowledge representation.
vs.
* Unstable and outdated technological base. No triplestore I have seen so far
seemed on par with MySQL 4.
* No freedom wrt to schema, instead modelling overhead. Spent 30 minutes trying to find a
predicate for "Euro".
* Scares off developers. Invested 2 days researching this, which is how long it
took me to implement OHs backend the first time around. Project would need to
be sustained through linked data grad students.
* Less flexibility wrt to analytics, querying and aggregation. SPARQL not so
hot.
* Good chance of chewing up the UI, much harder to implement editing.
I normally enjoy learning new stuff. This is just painful. Most of the above
points are probably based on my ignorance, but it really shouldn't take a PhD
to process some gov spending tables.
I'll now start a mongo effort because I really think this should go schema-free
+ I want to get stuff moving. If you can hold off loading Uganda and Israel for
a week that would of course be very cool, we could then try to evaluate how far
this went. Progress will be at: http://bitbucket.org/pudo/wdmmg-core
Friedrich
_______________________________________________
wdmmg-discuss mailing list
wdmmg-disc...@lists.okfn.org
http://lists.okfn.org/mailman/listinfo/wdmmg-discuss
----- End forwarded message -----
Friedrich,
Which Triple or Quad stores have you tested. Your MySQL 4 assertion
doesn't compute.
MySQL is a Relational Database, it doesn't compare to even a moderately
capable RDF Triple or Quad store (Relational Property Graph Databases
that support URI based Keys) when it comes to:
1. Heterogenously sourced data
2. Disparately shaped data
3. Volatile Schema.
Is your data available as a dump?
--
Regards,
Kingsley Idehen
President& CEO
OpenLink Software
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca: kidehen
