Re: new R2RML version with significant changes: please review from Boris Villazón Terrazas on 2010-11-22 (public-rdb2rdf-wg@w3.org from November 2010)

From: Boris Villazón Terrazas <bvillazon@fi.upm.es>
Date: Mon, 22 Nov 2010 02:31:11 +0100
To: Souripriya Das <souripriya.das@oracle.com>
CC: RDB2RDF WG <public-rdb2rdf-wg@w3.org>
Message-ID: <4CE9C7DF.1070404@fi.upm.es>

Hi Souri

1. I have one question regarding the new property rr:template of the 
rr:subjectMap
You are aware that implementors should know how to parse the string?, so 
we have to provide all the information about the format of that string 
(e.g.  {}, etc).

2. Also, I have a question regarding the SQLQuery (for creating a 
logical table)
If we want to concatenate a set of fields, in standard SQL we would use 
sth like

SELECT ID,(FirstName || ' ' || LastName) AS Name
FROM Student

However, for MySQL we would use:

  SELECT ID,CONCAT (FirstName,' ',LastName) AS Name
  FROM Student



So, do we have to be aware of these minimal differences? I mean this is 
DBMS dependent.

Boris

Received on Monday, 22 November 2010 01:31:44 UTC