testing for negative results (action from 30 Aug telecon)

ACTION: Ralph ask Eric Prud'hommeaux if there's a clever way to write a variant of tests 34-36 without @rel [recorded in http://www.w3.org/2007/08/30-rdfa-minutes.html#action09]

The objective is to test that the implementation does *not* produce
triples (e.g. in the case of test 34') relating 

  <http://sw-app.org/mic.xhtml#i>

to

  <http://sw-app.org/img/mic_2007_01.jpg> 

when the @rel attribute is omitted.

Eric suggests we could use

ASK WHERE {
	<http://sw-app.org/mic.xhtml#i> ?p <http://sw-app.org/img/mic_2007_01.jpg> .
}

and check that the answer is 0.  (Eric actually suggested the
more general 'ASK WHERE { ?s ?p ?o }', but I pointed out that
we'd decided it was OK if an implementation produced more
triples than the RDFa specification demands, though I don't
think we've characterized expected limitations on any such
'extra' triples.)

Eric's suggestion would require us to add to our test manifest
a property for each test indicating whether the 'pass' result is
1 (as all the current tests are) or 0.