On 7/26/12 9:06 AM, Adrian Walker wrote:
Hi Kingsley,You wrote..../Yes, but that's /[need for caching, replication] /another topic for a different debate since SPARQL isn't mandatory for Linked Data Publishing. Its just a *very* powerful declarative query language for exploiting Webby Linked Data/Maybe I'm missing something here, but surely any alternative to SPARQL would face exactly the same reliability over distributed-data problem?
To answer specifically about SPARQL, there is a protocol component that allows you to exploit the prowess of HTTP based data access, at Web scale. Cache invalidation and content negotiation integrated into SPARQL provides for powerful utility that's unrivaled by any other declarative query language e.g., SQL. Even better when you combine them both, as we've done for a very long time re. data virtualization etc..
Kingsley
Cheers, -- Adrian Internet Business LogicA Wiki and SOA Endpoint for Executable Open Vocabulary English Q/A over SQL and RDFOnline at www.reengineeringllc.com <http://www.reengineeringllc.com> Shared use is free, and there are no advertisements Adrian Walker ReengineeringOn Wed, Jul 25, 2012 at 6:43 PM, Kingsley Idehen <[email protected] <mailto:[email protected]>> wrote:On 7/25/12 6:20 PM, Adrian Walker wrote:Hi Kingsley, Michael & All, There is of course the 10-90 rule for taking things from early prototypes to industrial strength systems. (You get 90% of the way with 10% of the effort, but the rest takes 90% of the effort.) Looking to the industrial future, there's another concern about SPARQL. When a complex query is running, it may need to pull data from many endpoints. If one of these is down or busy, the query fails. Is there perhaps some work already on automatic local caching, or on seamless access to replicated endpoints ?Yes, but that's another topic for a different debate since SPARQL isn't mandatory for Linked Data Publishing. Its just a *very* powerful declarative query language for exploiting Webby Linked Data :-) KingsleyThanks, -- Adrian Internet Business Logic A Wiki and SOA Endpoint for Executable Open Vocabulary English Q/A over SQL and RDF Online at www.reengineeringllc.com <http://www.reengineeringllc.com> Shared use is free, and there are no advertisements Adrian Walker Reengineering On Wed, Jul 25, 2012 at 4:45 PM, Michael Brunnbauer <[email protected] <mailto:[email protected]>> wrote: Hello Kingsley, On Wed, Jul 25, 2012 at 01:31:32PM -0400, Kingsley Idehen wrote: > One of the fundamental misconceptions about Linked Data is the > assumption that Web-scale publication is a complex process, utterly > beyond the capabilities of end-users that are already capable of > creating, editing, and saving a document to a local or network drive. > > I've written a detailed post [1] showcasing how anyone can publish > Linked Data via a Turtle document ... I showed your post to my wife - who has been working in online publishing for more than 10 years. She has worked with many web content management systems and is able to read and write HTML markup. Like I expected, she lost you in the second paragraph. Maybe she would be able to learn linked data like she learned HTML - the hard way. But it would in fact be much harder because this time, she would have no reason to learn it and no tool to try out changes and see immediate *results*. Giovanni Tummarello recently summarized it all very good recently: http://www.mail-archive.com/[email protected]/msg11194.html We have to be honest with ourselves about this technology. Whose problems does it solve ? Who can understand it ? Are the tools usable in practise ? My answers to these questions are not optimistic. I understand that all these answers can change with time and some day we may have the bright future you are seeing. But I would not take that for granted. There is much work to do. Regards, Michael Brunnbauer -- ++ Michael Brunnbauer ++ netEstate GmbH ++ Geisenhausener Straße 11a ++ 81379 München ++ Tel +49 89 32 19 77 80 <tel:%2B49%2089%2032%2019%2077%2080> ++ Fax +49 89 32 19 77 89 <tel:%2B49%2089%2032%2019%2077%2089> ++ E-Mail [email protected] <mailto:[email protected]> ++ http://www.netestate.de/ ++ ++ Sitz: München, HRB Nr.142452 (Handelsregister B München) ++ USt-IdNr. DE221033342 ++ Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer ++ Prokurist: Dipl. Kfm. (Univ.) Markus Hendel--Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web:http://www.openlinksw.com Personal Weblog:http://www.openlinksw.com/blog/~kidehen <http://www.openlinksw.com/blog/%7Ekidehen> Twitter/Identi.ca handle: @kidehen Google+ Profile:https://plus.google.com/112399767740508618350/about LinkedIn Profile:http://www.linkedin.com/in/kidehen
-- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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