- From: Simon Schenk <sschenk@uni-koblenz.de>
- Date: Wed, 25 Mar 2009 13:38:07 +0100
- Cc: 'SPARQL Working Group' <public-rdf-dawg@w3.org>
Received on Wednesday, 25 March 2009 12:38:44 UTC
> In all SQL CLI's (call level interface) this is a given. Also, most > CLI's have array parameters, i.e. passing multiple sets of parameter > bindings in a single client-server message. The array parameter > question can be addressed in the conntext of the SPARQL protocol by > the HTTP 1.1 pipelining Apart from query optimization I see an interesting application for arrays in federation. Eric proposed something similar for this purpose [1]. Without it, distributed joins either need a large number of separate queries (resulting in high latency), or you need to mimic [1] by rewriting the query with lots of FILTERs or UNIONs as proposed in [2], which is a rather hacky solution. Cheers, Simon [1] http://www.w3.org/2007/05/SPARQLfed/ [2] Zemanek, Jan, Schenk, Simon, and Svatek, Vojtech. Optimizing SPARQL Queries over Disparate RDF Data Sources through Distributed Semi-Joins. ISWC 2008 Poster and Demo Session Proceedings. CEUR-WS. 2008. -- Simon Schenk | ISWeb | Uni Koblenz-Landau http://isweb.uni-koblenz.de http://www.uni-koblenz.de/~sschenk
Received on Wednesday, 25 March 2009 12:38:44 UTC