- From: Jan Wielemaker <wielemak@science.uva.nl>
- Date: Mon, 12 Jun 2006 17:06:08 +0200
- To: public-rdf-dawg-comments@w3.org
Hi, After fixing the remaining obvious bugs in the test-cases my Prolog parser now has 100% coverage on the syntax. Time for semantics ... Just a brief question for my understanding. Is the following true? If not, please explain why ... Variables (?name) and blank nodes (_:name) in queries are closely related. The name-spaces for variables and blank nodes are not related (i.e. ?a is not related to _:a). Blank nodes do not appear in the result-set of SELECT *. Where a variable matches any resource or literal, blank nodes only match resources. Notably the latter is unclear as -if I recall well-, the SPARQL document anticipates on allowing literals as subject in the future. Comments? I suggest to add a paragraph to the SPARQL definition explaining the relation between blank nodes and variables. Cheers --- Jan P.s. Ask if you want the diff between the original (XML) testcases and the fixed.
Received on Monday, 12 June 2006 15:06:29 UTC