Q: ISSUE-41 bNode semantics


In today's telecon we had a discussion regarding ISSUE-41 [1] and  
would appreciate a short advise from your side concerning the  
following question:
  Is a blank node an accurate representation of a NULL value from a  
relational database?

Note that this relates to the Direct Mapping (in R2RML one can  
overwrite the behaviour). We have identified options for dealing with  
the situation (producing no triple or introducing a bNode representing  
the NULL value) and would like to hear your opinion on the matter.

Tracker, this is my ACTION-131.


[1] http://www.w3.org/2001/sw/rdb2rdf/track/issues/41

Dr. Michael Hausenblas, Research Fellow
LiDRC - Linked Data Research Centre
DERI - Digital Enterprise Research Institute
NUIG - National University of Ireland, Galway
Ireland, Europe
Tel. +353 91 495730

Received on Tuesday, 17 May 2011 18:13:43 UTC