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Re: RDF Update Feeds + URI time travel on HTTP-level

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Sun, 22 Nov 2009 11:13:10 -0500
Message-ID: <4B096316.8060708@openlinksw.com>
To: nathan@webr3.org
CC: Linked Data community <public-lod@w3.org>, "Tummarello, Giovanni" <giovanni.tummarello@deri.org>
Nathan wrote:
> Damian Steer wrote:
>> On 22 Nov 2009, at 09:39, Danny Ayers wrote:
>>> 2009/11/22 Richard Cyganiak <richard@cyganiak.de>:
>>>> On 20 Nov 2009, at 19:07, Chris Bizer wrote:
>>> [snips]
>>>> From a web architecture POV it seems pretty solid to me. Doing stuff via
>>>> headers is considered bad if you could just as well do it via links and
>>>> additional URIs, but you can argue that the time dimension is such a
>>>> universal thing that a header-based solution is warranted.
>>> Sounds good to me too, but x-headers are a jump, I think perhaps it's
>>> a question worthy of throwing at the W3C TAG - pretty sure they've
>>> looked at similar stuff in the past, but things are changing fast...
>> See also http://tools.ietf.org/html/rfc3253
>> Subversion is a partial deltav implementation. It may well be the only deployed implementation.
> surely virtuoso webdav w/ ods breifcase can be classed as a deployed
> implementation; unsure of status re forking etc but most of it's there
> and functioning v well.
> nathan

Yes, but as usual we prefer to wait for some kind of consensus, and then 
we just put the relevant aspect of Virtuoso into play. In a nutshell, 
this is why we committed to industry standards from the get-go, since 
doing so reduces this kind of work to functionality orchestration :-)

WebDAV, Atom Pub, GData etc.. have all existed inside Virtuoso for a 
long time, but on their own the net effect has sometimes been confusion 
(due to value pyramid inversion on the part of its beholders). We also 
see XMPP (which you've alluded to recently, and bugged about by Danbri 
for sometime) and XMPP++ (Google Wave) as interesting. Ditto 
PubSubHubBub etc..

Also note, replication and synchronization e.g., via transaction logs 
(in the most sophisticated cases) is something Virtuoso has handled 
across SQL DBMS engines that provide API  access to transaction logs for 
eons, so this is all very familiar territory. I still remember 
confusion, at advent of blogging, when we indicated the existence of 
Atom and RSS aggregation and indexing support inside Virtuoso (sure you 
can Google up on that) :-)

Giovanni: why isn't the RDFsync protocol (from yourself and Orri) part 
of this conversation? My silence during this conversation has been 
deliberate :-)



Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO 
OpenLink Software     Web: http://www.openlinksw.com
Received on Sunday, 22 November 2009 16:13:49 UTC

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