Re: Linked Data Fragments: Web-scale querying

On Wednesday 19 March 2014 11:09:20 Kingsley Idehen wrote:
> On 3/19/14 10:03 AM, Olaf Hartig wrote:
> > Hi Martynas,
> > 
> > On Wednesday 19 March 2014 12:58:15 Martynas Jusevičius wrote:
> >> >Ruben,
> >> >
> >> >interesting stuff. I remember another project that does something like
> >> >that: SQUINhttp://squin.sourceforge.net/index.shtml
> > 
> > SQUIN implements a traversal-based query execution strategy that relies
> > only on the Linked Data publishing principles (i.e., the possibility to
> > look up HTTP URIs). Query processing approaches that have this property
> > are typically referred to as Linked Data query processing. If you want to
> > get an overview on these approaches, you may want to check out my recent
> > survey [1].
> > 
> >> >How does LDF compare to to it?
> > 
> > I understand LDF more as an alternative practice for publishing (Linked)
> > data on the Web. However, the primary purpose for proposing this practice
> > (as Ruben and his colleagues emphasize in their LDOW paper) his to
> > facilitate distributed querying without putting most of the burden on the
> > servers.
> > 
> > So, the primary difference between querying LDFs and the aforementioned
> > Linked Data query processing is that querying LDFs is a form of
> > distributed query processing, that is, some part of the execution of a
> > given user query is distributed to LDF servers (which provide a limited
> > form of query processing functionality). In contrast, Linked Data query
> > processing  is_not_  a form of distributed query processing. Instead, for
> > Linked Data query processing approaches, the whole execution of a query
> > happens within the Linked Data query processing system (e.g., SQUIN),
> > simply because these approaches do not assume / rely on server-side query
> > processing functionality (servers in this setting are only required to
> > answer URI lookup requests).
> > 
> > Cheers,
> > Olaf
> > 
> > 
> > [1] Olaf Hartig: An Overview on Execution Strategies for Linked Data
> > Queries. In Datenbankspektrum, 13(2) Jul. 2013.
> > http://olafhartig.de/files/Hartig_LDQueryExec_DBSpektrum2013_Preprint.pdf
> 
> Olaf,
> 
> Is there a live showcase instance of SQUIN somewhere?

I'm not maintaining any at the moment.
Olaf

Received on Friday, 21 March 2014 14:04:15 UTC