start working on Action-160

Hi all

I started working on ACTION-160 [1] I sketched a new section on the TC 
document [2].
I have to send regrets for tomorrow telecon, I need to prepare a project 
meeting, apologies.

Boris

[1] http://www.w3.org/2001/sw/rdb2rdf/track/actions/160
[2] 
http://www.w3.org/2001/sw/rdb2rdf/test-cases/<http://www.w3.org/2001/sw/rdb2rdf/test-cases/>