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Review of graph pattern conversion algorithm was RE: Draft of PR transition request

From: Ogbuji, Chimezie <OGBUJIC@ccf.org>
Date: Thu, 18 Oct 2007 08:44:19 -0400
Message-ID: <2702D0EBA4F0A749968E52E8644184EA288839@CCHSCLEXMB59.cc.ad.cchs.net>
To: "Lee Feigenbaum" <lee@thefigtrees.net>, "RDF Data Access Working Group" <public-rdf-dawg@w3.org>
re - graph pattern conversion algorithm:

It looks fine to me (it reads much better than before - IMO).  I went over it several times, and even compared it to the algorithm I use to do the same which is a method which gets passed to  the 'fold' [1] function (reduce in Python).  The way the algorithm accumulates expressions from left to right is a direct analog to how the function works.  So, it made (at least in my case) the effort much easier.  It also makes it easy to quickly identify all the possible ways an algebra can be formed (generally).  I think I mentioned this some time ago.

[1] http://en.wikipedia.org/wiki/Fold_%28higher-order_function%29

Chimezie (chee-meh) Ogbuji
Lead Systems Analyst
Thoracic and Cardiovascular Surgery
Cleveland Clinic Foundation
9500 Euclid Avenue/ W26
Cleveland, Ohio 44195
Office: (216)444-8593
ogbujic@ccf.org




-----Original Message-----
From: public-rdf-dawg-request@w3.org on behalf of Lee Feigenbaum
Sent: Thu 10/18/2007 2:30 AM
To: 'RDF Data Access Working Group'
Subject: Draft of PR transition request
 

Please see http://www.w3.org/2001/sw/DataAccess/prq819

Note a few @@s that remain - some ask questions that I'd appreciate 
input on. Of course, any comments in general are appreciated, as this 
request represents the DAWG.

Note that the implementation reports for the protocol and query results 
XML format and the Dispositions of Comments for all three specs are in 
nearly final state. We are still working on the implementation report 
for the query language after finding a bug in the scripts that generate 
it that made us think our results were a bit more complete than they 
are. (You can see the current results of the QL impl report at 
http://www.w3.org/2001/sw/DataAccess/tests/implementations rather than 
at the URL in the request: once this report stabilizes, I will be moving 
it to the frozen URL, adding a summary, and adding information on REDUCED.)

Still to do:

  + reviews of graph pattern conversion algorithm from Chimezie and EricP
  + response to commenter Frank McCabe
  + final query language implementation report
  + move schema and WSDL to /2007/SPARQL and update relative URIs and 
links in specifications


In any case - comments on the draft transition request are welcome. Of 
course, the sooner the better helps. :-)


Lee





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Received on Thursday, 18 October 2007 12:44:47 GMT

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