- From: Michael Hausenblas <michael.hausenblas@deri.org>
- Date: Mon, 13 Jun 2011 15:03:25 +0100
- To: Lee Feigenbaum <lee@thefigtrees.net>
- Cc: W3C SPARQL WG comments <public-rdf-dawg-comments@w3.org>
Lee, > We would be grateful if you would acknowledge that your comments > have been answered by sending a reply to this mailing list. Yes. Thanks. Cheers, Michael -- Dr. Michael Hausenblas, Research Fellow LiDRC - Linked Data Research Centre DERI - Digital Enterprise Research Institute NUIG - National University of Ireland, Galway Ireland, Europe Tel. +353 91 495730 http://linkeddata.deri.ie/ http://sw-app.org/about.html On 13 Jun 2011, at 15:02, Lee Feigenbaum wrote: > Hi Michael, > > Thanks for your comments on the SPARQL 1.1 Update Last Call draft. > > While the Working Group has considered existing implementation > experience and the implement-ability of the update language in > defining the update specification, the group is not inclined to > discuss specific implementation strategies within the document. The > SPARQL 1.1 Update language is designed to be used to update data > within RDF graph stores, and the Working Group has identified many > application scenarios that require the ability to delete data (in > addition to inserting new data or doing both at once). The group > agrees that updating large amounts of data may be time-consuming > against very large data sets, but feels that implementation > techniques to address this are beyond the scope of our charter and > this specification. Please note that it is not unusual for query or > update languages to give application the ability to execute > operations that are very time consuming under certain conditions. > > The Working Group intends to advance this specification to W3C > Candidate Recommendation status and to call for implementations of > the language, along with any experiences related to implementing the > language that might be cause for concern in the design of the > language. As you use and/or implement the update language, we'd of > course welcome any feedback you have if there are parts of the > language design that might change to address your concerns over > large-scale deployments. > > We would be grateful if you would acknowledge that your comments > have been answered by sending a reply to this mailing list. > > thanks, > Lee > On behalf of the SPARQL Working Group > > On 5/29/2011 12:29 PM, Michael Hausenblas wrote: >> >> All, >> >> This is a comment concerning the Last Call Working Draft 'SPARQL 1.1 >> Update' [1]. It is clearly written and, AFAICT sound. However, I >> have an >> issue with it - more on the conceptual level. I tried to express my >> concerns in a blog post [2] and will do my best to summarise in the >> following. >> >> While the proposed update language - without any doubt - is perfectly >> suitable for 'small to medium'-sized setups, I fear that we will run >> into troubles in large-scale deployments concerning the costs for >> updating and deleting huge volumes of triples. Now, I wish I had >> experimental evidence myself to proof this (and I have to admit I >> don't >> have), but I would like the WG to consider to either include a >> section >> discussing the issue, or setting up a (non-REC Track) document that >> discusses this (which could be titled 'implementation/usage advices >> for >> large-scale deployments' or the like). I do feel strongly about >> this and >> would offer to contribute to such a document, if desired. >> >> I'd very much appreciate it if WG members would be able to point me >> to >> own experiences in this field (experiments or real-world deployments >> alike). >> >> Cheers, >> Michael (with my DERI AC Rep and RDB2RDF WG co-chair hat off) >> >> [1] http://www.w3.org/TR/2011/WD-sparql11-update-20110512/ >> [2] http://webofdata.wordpress.com/2011/05/29/ye-shall-not-delete-data/ >> >> -- >> Dr. Michael Hausenblas, Research Fellow >> LiDRC - Linked Data Research Centre >> DERI - Digital Enterprise Research Institute >> NUIG - National University of Ireland, Galway >> Ireland, Europe >> Tel. +353 91 495730 >> http://linkeddata.deri.ie/ >> http://sw-app.org/about.html >> >> >>
Received on Monday, 13 June 2011 14:04:05 UTC