- From: Ivan Mikhailov <imikhailov@openlinksw.com>
- Date: Thu, 22 May 2008 16:03:56 +0700
- To: Gregory Williams <greg@evilfunhouse.com>
- Cc: Semantic Web <semantic-web@w3.org>
Gregory, Indeed, but I did not proposed that because there is a risk that someone would like that proposal :) Best Regards, Ivan Mikhailov, http://www.openlinksw.com On Wed, 2008-05-21 at 12:06 -0400, Gregory Williams wrote: > On May 21, 2008, at 2:49 AM, Ivan Mikhailov wrote: > > > (:Tuesday :Sunday) is a good approach for non-SPARQL data retrieval, > > say, for explicit graph traversal. Due to scalability reasons, SPARQL > > has no features to deal with collections. Hence all what one can do > > with > > SPARQL and (:Tuesday :Sunday) is to retrieve the head of the > > collection > > and access it from application, making negation logic inside the > > application. That's quite OK if the application is co-located with the > > data source, otherwise one had to query for sequence items in sequence > > via net with all related ping times. > > Since there are at most seven items in the list in this example, it > should be possible to construct a single SPARQL query using chained > OPTIONAL blocks to get all the :closingDays values. > > .greg >
Received on Thursday, 22 May 2008 09:08:16 UTC