On 22/04/13 22:17, Jesse Weaver wrote:
Public SPARQL Dev mailing list,
In section 18.2.2.6 of the W3C Recommendation of SPARQL 1.1
<http://www.w3.org/TR/sparql11-query/#sparqlTranslateGraphPatterns>,
there appears (to me) to be some ambiguity in the translation of group
graph patterns.. Specifically, in the pseudocode following "If the form
is GroupGraphPattern", the third (non-blank) line says "For each element
E in the GroupGraphPattern". No order seems to be explicitly given
(unless I overlooked some mandate elsewhere in the recommendation), yet
the order seems to be significant since each iteration of the loop
builds on the G from the previous iteration. Could someone please
provide some clarity on the matter or point out my misunderstanding?
Thank you.
-Jesse Weaver
Jesse,
You are right the wording could be better. As it's a syntax
translation, there is an implicit natural ordering, but it ough to be
stated.
(this applies to SPARQL 1.0 as well).
I have added it to the errata.
http://www.w3.org/2013/sparql-errata
Andy
