Re: GUADEC redux and roadmap
- From: "Enrico Minack" <minack l3s de>
- To: <dashboard-hackers gnome org>
- Subject: Re: GUADEC redux and roadmap
- Date: Fri, 7 Jul 2006 17:32:33 +0200
* Metadata store - Jon and I talked about this at GUADEC and
after thinking about it for a few days, I think we have an
approach that will work. Whether or not it scales is yet to be
seen, however. Right now we are storing all of our metadata in
Lucene. This works fine for largely immutable text-based
values, but doesn't work well when you want to deal with
external metadata (think Nautilus emblems, Leaftag or F-Spot
tags, etc.). The plan currently is to move storing of all
metadata into a database and use Lucene only for its text
indexing capabilities. This will allow us to (a) adapt better
to changes in external metadata stores, (b) store metadata
ourselves on behalf of applications, and (c) make keyword
searches simpler. I started prototyping something on my laptop
on the plane; I'll need to play with it a little bit more if I
can get my laptop going again.
Joe, it would be great if these metadata would be stored as RDF. Both
the metadata as well as their schemas can be represented as RDF, which
then makes the RDF store the perfect exchange mechanism between all
applications generating these metadata, and applications using them. We
use that approach in our NEPOMUK project, and it works very well to
integrate contributions from different project partners.
Storing the metadata in RDF also enables path-like queries where you
traverse
along the graph which connects different entities (Emails, Documents,
Persons, ...)
via their metadata (received by, ...).
Enrico Minack
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