On Tue, 18.08.09 21:00, Ivan Frade (ivan.fr...@gmail.com) wrote: Ivan,
Thanks, this mail is very helpful! > > I guess a problem here is that nobody except the Tracker people > > themselves even know what an ontology or Nepomuk actually is. > > You can consider an ontology as high level language to describe data, a > language to write "db schemas". Why ontologies and not SQL files? In few > words, because ontologies are easier to describe the things, classify them > into a hierarchy and express their properties. > > Nepomuk was a EU-funded project about "the semantic desktop". In that > project, some research centers/companies defined a set of ontologies to > describe the desktop and wrote some code for KDE. Nowadays we use "Nepomuk" > to talk about the ontologies, and the KDE software using them is > Nepomuk-KDE. > > > Just > > throwing around buzzwords that nobody understands doesn't really help > > dumb people like me actually get a grip on what tracker actually is, > > and help them understand that it isn't what they thought it was. > > > Tracker 0.6 is a "usual" index engine: crawl the filesystem and extract > words, so the user can use those words to find the content. > > The new tracker (0.7) is pretty different. Now we have a stand-alone store > (tracker-store) with a well-define schema to store the information (Nepomuk > ontologies). That information is provided by miners: one for the filesystem > (tracker-miner-fs), another for RSS Feeds, another for Emails (a plugin in > evolution), and there could be more... (e.g. Zeitgeist could provide links > between documents). Then the queries are not (only) free text, but (also) > structured queries using categories and properties. > > The benefits? Having all the information together under a common schema, > > 1) we can _link_ the information. So you could ask: "all messages with > Martyn" and get a list of IM conversations (coming from telepathy), Email > threads (coming from evo) and his blog posts (coming from the RSS miner). > 2) we make the data more cross-application: your Bookmarks can be shared > between epiphany and firefox. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net http://0pointer.net/lennart/ GnuPG 0x1A015CC4 _______________________________________________ desktop-devel-list mailing list desktop-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/desktop-devel-list