Re: [Tracker] Object / RDF storage

[Michele Tameni <michele amdplanet it>]

Sorry for the delay, reply inline :)

On Sat, May 16, 2009 at 9:02 AM, Philip Van Hoof <spam pvanhoof be> wrote:

> This AppDevelopersManual is outdated.

Dho!

> Most important things that you need to know about for Tracker's first
> next release series (the 0.7 release series) is the Nepomuk ontology and
> SPARQL as query language.
>
> Âo. http://www.semanticdesktop.org/ontologies/
> Âo. http://www.w3.org/TR/rdf-sparql-query/
>
>
> o. Right now you simply give the SPARQL query as a "s" (a string over
> Â DBus) to a method:
>
> Â org.freedesktop.Tracker.Resources, /org/freedesktop/Tracker/Resources
> Â on service org.freedesktop.Tracker (note that these might change in
> Â future)
>
> Â SparqlQuery (query as s) -> result as array of [array of string]

> You also have
>
> o. Deleting triples
>
> Â Delete (subject, predicate, object)
>
> o. Inserting triples (individual ones)
>
> Â Insert (subject, predicate, object)
>
> o. Loading a Turtle file into the store (bulk insert):
>
> Â Load (uri as string)
>
> o. Update extension which implements:
> Â http://jena.hpl.hp.com/~afs/SPARQL-Update.html
>
> Â SparqlUpdate
>
>
> And you have the class signals. The online documentation for this is
> updated and available here:
>
> http://live.gnome.org/Tracker/Documentation/SignalsOnChanges

ok, so this api is accessible only trought dbus? no lib avaiable?

> > there is an api that permit to store object and their metadata that
> > allow me to forget rdf?
>
> Note yet for master. Except some of the tools and maybe a few very
> simple APIs (get all files that are audio, for example).

ok, so for its not possible, for example, retrive all file and their
metadata for files that are audio (for example)?

> > Actually i haven't looked the code, but reading around i hope that
> > tracker can do all things i need, but i want a confirm :)
>
> Confirmed

:)


-- 
michele tameni
http://www.amdplanet.it