Test cases

I notice in a few test cases - e.g:

	sparql-query-example-Testing-Values-0
	sparql-query-example-Testing-Values-1	

that seemingly invalid dateTimes are used:

	xsd:dateTime("2005-01-01T00:00Z")

(i.e. seconds aren't optional are they?)

Is this an error in the test case or does it imply that the xsd:dateTime
function is supposed to be liberal in what it accepts?

Also, BTW, I think those particular two tests would be clearer if they
didn't used bnodes as subjects.

- Geoff