- From: Steve Harris <steve.harris@garlik.com>
- Date: Tue, 13 Jul 2010 14:42:01 +0100
- To: Andy Seaborne <andy.seaborne@talis.com>
- Cc: Alexandre Passant <alexandre.passant@deri.org>, SPARQL Working Group <public-rdf-dawg@w3.org>
On 2010-07-13, at 14:39, Andy Seaborne wrote: > > On 13/07/2010 1:25 PM, Steve Harris wrote: >> On 2010-07-13, at 11:46, Alexandre Passant wrote: >> >> [ snip, all looks good to me ] >> >>> We initially thought that ALL includes also the default graph, but that will be a problem for removing all named graphs but not the default one (not sure that will happen so often, yet) >>> So better to have ALL = all named graphs, which leads to the following to clean the store >>> >>> DROP ALL >>> DROP DEFAULT >>> >>> or >>> >>> DROP ALL >>> CLEAR DEFAULT >>> >>> What do you think ? >> >> I prefer DROP/CLEAR ALL does everything, including the default graph. "ALL" implies that to me. > > I'm comfortable with that. > > Another possibility for completeness: a special form like > > RESET STORE > > that then puts it outside the issue of whether ALL is all named graphs or all graphs. Yup. That works. >> If I really want to leave the named graph, and CLEAR the others I can do that with: >> >> DELETE WHERE { GRAPH ?g { ?x ?y ?z } } >> >> Admittedly there's no DROP equivalent, for graphs that don't do empty graph culling, but that's well into corner cases AFAIC. > > It's not a corner case for me - some implementations are quite happy with empty graphs and they don't naturally get culled. Such grah stores are a collection of graphs, not stored in a common quad table. The corner case is that, plus you want to leave the anonymous graph. >> Otherwise, you could add a "GRAPH *" like syntax, meaning all named graphs, but I predict that users would confuse GRAPH * and ALL a lot. > > Maybe - I'm more comfortable with DROP GRAPH *. With an explicit use of GRAPH, and DEFAULT (not GRAPH DEAFULT) it makes sense and is explainable. At least "DROP GRAPH *" does not destroy data that the user didn't want addressed. I don't follow this, but I'm really not that bothered :) - Steve -- Steve Harris, CTO, Garlik Limited 1-3 Halford Road, Richmond, TW10 6AW, UK +44 20 8439 8203 http://www.garlik.com/ Registered in England and Wales 535 7233 VAT # 849 0517 11 Registered office: Thames House, Portsmouth Road, Esher, Surrey, KT10 9AD
Received on Tuesday, 13 July 2010 13:42:37 UTC