- From: Lee Feigenbaum <lee@thefigtrees.net>
- Date: Wed, 18 May 2011 08:53:15 -0400
- To: Graham Klyne <graham.klyne@zoo.ox.ac.uk>
- CC: Steve Harris <steve.harris@garlik.com>, public-rdf-dawg-comments@w3.org
On 5/18/2011 3:19 AM, Graham Klyne wrote: > For the purposes of your formal process, please treat this as > acknowledgement of satisfactory resolution. > > ... > > Issue 2 is certainly resolved. > > For issue 1, I think the test cases probably help out, but they're not > so easy to navigate for casual enquiry. Is there a human-readable > version of the test case manifest? It seems much of the data is there > from which one could be generated automatically. Hi Graham, Over the next several weeks, we will be looking at producing a human readable version of the test manifest, similar to what the SPARQL 1.0 WG did here: http://www.w3.org/2001/sw/DataAccess/tests/r2 Do you think that that would help this out? Lee > > #g > -- > > Steve Harris wrote: >> In response to >> http://lists.w3.org/Archives/Public/public-rdf-dawg-comments/2010Sep/0000.html >> >> >> > 1. Editorial >> > >> > I'm finding the section on aggregates is quite hard to follow. >> > >> > More examples, especially for GROUP_CONCAT, might make it easier >> > to understand the link between the algebra and its practical >> consequences >> > in SPARQL queries. >> >> There is a balance between providing examples, and making the document >> too long. >> >> The explanatory section on aggregates has been expanded, and there are >> now some testcases for aggregates >> http://www.w3.org/2009/sparql/docs/tests/data-sparql11/aggregates/ - >> which hopefully illustrate the behaviour. >> >> > Also, I can't find any indication of the interaction between GROUP >> BY and ORDER >> > BY, where the ORDER BY specifies a variable not named in the GROUP >> BY: is this >> > allowed? If so, what effect does it have (e.g. on GROUP_CONCAT)? >> >> Aggregate operations are performed on a multiset, so order is not >> preserved. >> >> The group discussed the possibility of adding this feature but decided >> to postpone it to a future working group. >> >> Please note: “ORDER BY after a GROUP BY must only use variables >> exposed by the GROUP. Use of non-grouping variable outside the GROUP >> BY is not legal and a required syntax error.” >> >> For example: >> >> SELECT ?book ?title >> WHERE { >> ?book dc:title ?title } >> GROUP BY ?book >> ORDER BY ?title >> ==> error. >> >> > 2. A Nice-to-have feature >> >> We understand that you have now seen another solution to this issue, >> see >> http://lists.w3.org/Archives/Public/public-rdf-dawg-comments/2010Oct/0001.html. >> >> >> Could you please respond to this message saying whether this comment >> has been answered to your satisfaction. >> >> Regards, >> Steve, on behalf of the SPARQL Working Group >> > > >
Received on Wednesday, 18 May 2011 12:53:44 UTC