See also: IRC log
<trackbot> Date: 29 October 2009
<scribe> Scribenick: mhausenblas
<Ahmed> Hi Harry
ahm, hhalpin am I scribing or you?
well, then ..
please leave it to me - there are plenty of useless topics on the agenda, hence ...
<angela> 039046188aabb is Angela
PROPOSAL: accept minutes of previous telecon http://www.w3.org/2009/10/22-RDB2RDF-minutes.html
<soeren> aacc is soeren
<Souri> For Triplify presentation, are we using the 22-slide pdf file?
RESOLUTION: minutes from last telecon accepted
Ashok: next week is TPAC
<soeren> that's the triplify presentation
<hhalpin> +1 to skipping telecon next week.
<hhalpin> Then we also get to reconfigure time today.
<trackbot> ACTION-8 -- Harry Halpin to double-check EricP's status and have him send in his proposals about mapping -- due 2009-10-29 -- OPEN
<trackbot> ACTION-8 Double-check EricP's status and have him send in his proposals about mapping closed
<trackbot> ACTION-10 -- Harry Halpin to will add 10 more participants to telecon -- due 2009-10-29 -- OPEN
<trackbot> ACTION-10 Will add 10 more participants to telecon closed
<hhalpin> close ACTION-11
<trackbot> ACTION-11 Ask EricP for back-up closed
<hhalpin> Notes "The mapping language MUST define the set of relational algebra to be supported in the first release. This set to be supported SHOULD be as complete as possible and be defined as soon as possible after the WG official launch."
<hhalpin> I expect that we should have Marcelo give a presentation on his work on formal semantics ASAP after we're done with the implementation overviews.
T+4: Requirements and Use Cases for the RDB2RDF Mapping Language (R2RML)
<Souri> About the requirements 'SHOULD' portion: What is "human-readable"? Is SQL query human-readable?
soeren: our group works on couple of tools (DL Learner, etc.) as well as onTriplify
many DB-backed applications
idea: when we're able to RDFise the content of these DB, we gain quite a bit - Web of Data
most of the tools are OSS, should be easy to integrate
configure once, use often
solution: uses SQL to transform
extends SQL with some syntactic constructs
maps URI patterns to set of SQL patterns
according to the Linked Data principles
Ashok: will you talk about the extensions?
... just some conventions, actually
... few tables anyway, no automatic generation, hence
... conventions, such as first col must be an ID, the col name should refer to RDF properties
Souri: conceptual mapping or materialising?
soeren: here is an example mapping a WP blog post
SELECT id, post_authorAS 'sioc:has_creator->user',
post_title AS 'dc:title',
post_content AS 'sioc:content', post_date AS
post_modified AS 'dcterms:created^^xsd:dateTime'
WHERE post_status='publish‘ (ANDid=xxx)
Souri: we took the same
... our work was so far only internally
... there are two approaches to address the datatype
soeren: needed to overwrite the default (Triplify supports both)
Souri: I think we need a consistency check - explicit might be more benfical
shows the actual RDF conversion
summarises the implementation of Triplify
design principle is KISS
no new mapping language (SQL is used)
available for popular languages
works with most DBs
an example of an WP blog configuration
we offer a configuration repository
a temporal extension
address the 'when to crawl data'
shows how this works in Triplify
Michael: would be good to know the update voc URI
LOD update log generation
<Souri> LOD means ???
Linked Open Data
soeren: used the spatial extension to create linked data version of OpenStreetMap
example from http://linkedgeodata.org/
Souri: which query interface do you support?
soeren: based on URIs
skip to slide 19
RDB2RDF tool comparison
Triplify, D2R and Virtuoso views
soeren: Triplifysupports the
“long tail” of deployed Web applications
... that's it - questions?
soeren: it's OSS
... more background on Triplify see WWW paper above, will send to list and update Wiki
hhalpin: did the voting
<hhalpin> 11 EST
<hhalpin> Which would be 8AM EST on Tuesday.
<hhalpin> 8AM PST Tuesday 11 EST.
<hhalpin> Ashok - you can do 9AM Tuesday but not 8AM.
<Ashok> That is correct
<Souri> 9am PST, 12 noon EST Tues
<Ashok> Souri, I hope that's OK for you
everyone should check with http://www.timeanddate.com/worldclock/converter.html
<Souri> Ashok it is okay for me
<hhalpin> 5:00 PM GMT.
<scribe> ACTION: hhalpin to inform li ma [recorded in http://www.w3.org/2009/10/29-RDB2RDF-minutes.html#action01]
<trackbot> Created ACTION-12 - Inform li ma [on Harry Halpin - due 2009-11-05].
next meeting is on Tuesday 10 November 2009 at 17:00 GMT
<hhalpin> RESOLVED: To meet 10 Nov. 2009 17:00 UTC.
<hhalpin> take care!
<hhalpin> trackbot, end meeting