Comments for Trueg's Blog

Comment on Virtuoso – Once More With Feeling by Sebastian Trüg

Sebastian Trüg — Tue, 17 Nov 2009 08:24:51 +0000

I added a little hint to the cmake output

Comment on Virtuoso – Once More With Feeling by Andras

Andras — Sun, 15 Nov 2009 20:09:30 +0000

The checks are not good enough IMO, it doesn’t say what you need. Yes, Step3 contains I need iodbc, but if I don’t read this blog, I wound’t know from the cmake output.

Comment on Virtuoso – Once More With Feeling by Ryan Rix

Ryan Rix — Tue, 03 Nov 2009 15:30:08 +0000

The packages for Fedora in kde-redhat unstable (built by Rex Dieter) require the same thing to be done.

Comment on SPARQL is weird… by Ivan Mikhailov

Ivan Mikhailov — Thu, 29 Oct 2009 18:58:33 +0000

bif:exists() may be faster than OPTIONAL… FILTER() or may be slower. When the query is simple enough the optimizer will find full set of possible execution plans for any of these notations and these sets will be identical, so the best plan found will be the same for both variants. When the query is complicated enough (and number of execution plans grow exponentially), the compiler will evaluate some subset of whole set of plans starting from different points (left outer join in case of OPTIONAL…FILTER() and “straightforward” subselect for bif:exists()). Substs will usually intersect and at least some execution plains in the intersection are usually very good, but some plans outside the intersection might be just perfect, so the notation works as a “fine tuning” for the optimizer.

With usual settings, “query is complicated enough” means “one page long” for SPARQL on RDF data or “half page long” for sophisticated SPARQL-BI on RDF Views.

Comment on Just another way of browsing your files by mxttie

mxttie — Thu, 29 Oct 2009 15:22:05 +0000

timeslider => exactly my thoughts! i would certainly use such functionality (and also being able to specify a root folder from where you want to search)

Comment on And Yet Another Post About Virtuoso by VOS Maintainer

VOS Maintainer — Wed, 28 Oct 2009 12:31:59 +0000

Documentation on how to extract ODBC meta information on the RDF result is now available from the online documentation:

http://docs.openlinksw.com/virtuoso/virtodbcsparql.html

Comment on Just another way of browsing your files by mat69

mat69 — Tue, 27 Oct 2009 23:02:36 +0000

Great job!

Though it cannot create the ioslave here, it reports an error when loading kio_timeline. Do I also have to recompile some other components?

Comment on Just another way of browsing your files by Khashayar

Khashayar — Tue, 27 Oct 2009 15:39:58 +0000

Brilliant!

Comment on Just another way of browsing your files by Sebastian Trüg

Sebastian Trüg — Tue, 27 Oct 2009 08:42:26 +0000

That would be way better. But it would be done using the same KIO slave I suppose.

Comment on Just another way of browsing your files by Sebastian Trüg

Sebastian Trüg — Tue, 27 Oct 2009 08:34:06 +0000

It is perfectly possible to create a GUI which provides a timeslider. It is probably even very simple. Does someone want to step up? I think this is a nice way of getting into Nepomuk development.