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On Monday, 2009-11-30, Vincenzo Di Massa wrote:

> On Mon, Nov 30, 2009 at 2:50 PM, Jos Poortvliet <jospoortvliet@gmail.com>=
=20
wrote:

[snip]

> > Tracker
> > is really not flexible enough for what you want to do, as far as I can
> > tell.
>=20
> I have the same impression, but I guess that experimenting both
> tracker and soprano is added value to itsme and KDE and Gnome :-)
>=20
> Maybe we could write a post about the switch  and its reasons.

I wouldn't assume anything about Tracker's capabilities since they are quit=
e a=20
fast moving project.
They've switch to using Nepomuk ontologies and Sparql as the query language=
,=20
they use the same library for extracting file metadata (streamanalyiers=20
originally written for Strigi), they have a D-Bus based client which can=20
retrieve mail related data from mail user agents supporting that D-Bus API.=
=20
etc.

There are probably differences in resource usage, speed, maximum query=20
complexity, etc. when compared to Nepomuk-KDE, but that would have to be=20
evaluated in the context of the target scenario in order to see if these=20
differences have any significance.

The value of Nepomuk-KDE for developers is probably mainly its high-level A=
PI=20
so one doesn't have to build sqarql queries manually, the convenience APIs=
=20
like ready to use widgets (e.g. rating widget) and data integration such as=
=20
with Akonadi (e.g. allowing queries that find person related contacts,=20
calendar entries, mails from/to/about, etc).

The last point (data integration) can of course also be achieved with Track=
er=20
provided somebody implements it, so the value right now is that it already =
has=20
been implemented for Nepomuk-KDE.

Cheers,
Kevin
=2D-=20
Kevin Krammer, KDE developer, xdg-utils developer
KDE user support, developer mentoring

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