Re: [Tracker] How to use tracker-miner-rss?

[Adrien Bustany <abustany gnome org>]

OK, your nie:DataObject is perfectly valid then, I didn't think about
nie:url.

Le Mon, 21 Feb 2011 00:19:02 +0900,
simon hong <simon hong81 gmail com> a écrit :

> Hello, Adrien!
>
> First, Thank you for advice :)
>
> I wrote ttl file based onsource code(tracker-miner-rss.c 533 line)'s
> query that fetch feed address from tracker-store.
>
> tracker-miner-rss.c used this query.
>
> ========== code - start ===========
>
>         sparql = "SELECT ?chanUrl ?interval ?chanUrn WHERE "
>                 "{ ?chanUrn a mfo:FeedChannel . "
>                 "?chanUrn mfo:feedSettings ?settings . "
>                 "?chanUrn nie:url ?chanUrl . "
>                 "?settings mfo:updateInterval ?interval }";
>
> ========== code - end ============
>
> To set chanUrn's nie:url object, I make the FeedChannel a DataObject.
> I cannot set nie:url without making a FeedChannel a DataObject.
>
> I'm a newbie to sparql and rdf ontology.
>
> I'll happy with any your valuable advice.
>
> Thank you.
> Simon.
>
> 2011/2/20 Adrien Bustany <abustany gnome org>
>
> > I don't think you need to make the FeedChannel a DataObject,
> > actually it's not one.
> >
> > Regarding the critical, that looks not so good :/ Hopefully the
> > author will comment here.
> >
> > Cheers
> >
> > Adrien
> >
> > Le Sun, 20 Feb 2011 23:33:00 +0900,
> > simon hong <simon hong81 gmail com> a écrit :
> >
> > > Hi,
> > >
> > > In these days, I'm trying to use tracker-miner-rss.
> > > I tried Tracker-based feed reader
> > > ( http://phidias.barberaware.org/ ), but sadly, it cannot build
> > > with latest tracker libraries.
> > >
> > > I want to write tracker-feed utility to manage feed information
> > > for tracker-miner-rss, but currently I don't have enough
> > > knowledge about tracker system and rdf ontology.
> > >
> > > So, I wrote ttl file to insert feed information for
> > > tracker-miner-rss.
> > >
> > > =====   ttl file contents - start ======
> > >
> > > @prefix nie:
> > > <http://www.semanticdesktop.org/ontologies/2007/01/19/nie#>.
> > > @prefix mfo: <http://www.tracker-project.org/temp/mfo#>.
> > >
> > > <nytimes> a nie:DataObject, mfo:FeedChannel;
> > >         mfo:feedSettings <nytimesSettings>;
> > >         nie:url "http://feeds.nytimes.com/nyt/rss/Americas";;
> > >         nie:title "nytimes - Americas" .
> > >
> > > <nytimesSettings> a mfo:FeedSettings;
> > >         mfo:updateInterval 1 .
> > >
> > > ====== ttl file contents - end =======
> > >
> > > After I import this file by using tracker-import, I could confirm
> > > by the same sparql query in tracker-miner-rss.
> > >
> > > tracker-sparql -q "SELECT ?chanUrl ?interval ?chanUrn
> > > WHERE{?chanUrn a mfo:FeedChannel . ?chanUrn
> > > mfo:feedSettings ?settings . ?chanUrn
> > > nie:url ?chanUrl . ?settings mfo:updateInterval ?interval}"
> > >
> > > tracker-query outputs
> > > Results:
> > >   http://feeds.nytimes.com/nyt/rss/Americas, 1, nytimes
> > >
> > > After this import, I run "/usr/local/libexec/tracker-miner-rss"
> > > And, It is dead by segmentation fault.
> > >
> > > This is the output tracker-miner-rss.
> > > ======= tracker-miner-rss output - start ========
> > > Starting log:
> > >   File:'/home/simon/.local/share/tracker/tracker-miner-rss.log'
> > >
> > > (tracker-miner-rss:28218): GLib-GObject-WARNING **: invalid cast
> > > from `TrackerSparqlBackend' to `TrackerMinerRSS'
> > >
> > > (tracker-miner-rss:28218): GLib-GObject-WARNING **: invalid cast
> > > from `TrackerSparqlBackend' to `TrackerMiner'
> > > Segmentation Fault
> > > ======= tracker-miner-rss output -end =========
> > >
> > > Am I wrong to use tracker-miner-rss or my ttl file?
> > > I want to use tracker-miner-rss, but it is difficult to me.
> > >
> > > Please give any advices.
> > >
> > > Thank you.
> > > Simon.
> > >
> > >
> > > 2011/1/31 Martyn Russell <martyn lanedo com>
> > >
> > > > On 25/01/11 14:57, Roberto Guido wrote:
> > > >
> > > > > On Tue, 2011-01-25 at 23:33 +0900, simon hong wrote:
> > > > >
> > > > > > When I want to add feed adsress, shoud I update feed address
> > > > > > in tracker store by using tracker-sparql?
> > > > > > Is this right?
> > > > > >
> > > > > >  Yes, it is. All managed feeds are mapped in tracker-store
> > > > > > with MFO
> > > > > ontology, no other configurations are involved.
> > > > >
> > > > > Some time ago I started a project for a Tracker-based feed
> > > > > reader ( http://phidias.barberaware.org/ ), but as many other
> > > > > things I had noTracker-based feed reader
> > > > > time to maintain and evolve it. My TODO list is too long :-\
> > > > > In that package you find feeds-manager, a graphical tool to
> > > > > admin feeds mapped in tracker-store (add, remove, change
> > > > > attributes...): I'm unsure it is yet aligned with current
> > > > > version of Tracker's API, try it and if it doesn't works we
> > > > > can try to fix it.
> > > >
> > > > Actually, it is interesting you mention this, I would like to
> > > > improve the way feeds are used with the tracker utils perhaps. I
> > > > agree, we have a miner, but it is not obvious how that miner
> > > > works or how to get your feeds into it. Perhaps tracker-feed (a
> > > > new utility) should be written to test and allow simple
> > > > administration of this?
> > > >
> > > > Any takers?
> > > >
> > > > --
> > > > Regards,
> > > > Martyn