tracker-sparql - Use SparQL to query the Tracker databases.

NAME

       tracker-sparql - Use SparQL to query the Tracker databases.

SYNOPSIS

       tracker-sparql [OPTION...] [-q QUERY] | [-f FILE]

DESCRIPTION

       tracker-sparql  allows  the caller to run an RDF query on the database.
       This can be done two ways. Either by providing a FILE with the query or
       by providing a string with the QUERY string.

       The FILE argument can be either a local path or a URI. It also does not
       have to be an absolute path.

OPTIONS

-?, --help
Show summary of options.

-f, --file=FILE
Use a FILE with SPARQL content to query or update.

-q, --query=SPARQL
Use a SPARQL string to query the database with.

-u, --update
This has to be used with --query. This tells tracker-sparql to
use the SPARQL update extensions so it knows it isn't a regular
data lookup request. So if your query is intended to change data
in the database, this option is needed.

-c, --list-classes
Returns a list of classes which describe the ontology used for
storing data. These classes are also used in queries. For
example, http://www.w3.org/2000/01/rdf-schema#Resource is one of
many classes which should be returned here.

-x, --list-class-prefixes
Returns a list of classes and their related prefixes. Prefixes
are used to make querying a lot simpler and are much like an
alias. For example, http://www.w3.org/2000/01/rdf-
schema#Resource has the prefix rdfs so queries can be cut down
to:

"SELECT ?u WHERE { ?u a rdfs:Resource }"

-p, --list-properties=CLASS
Returns a list of properties which pertain to a class. You can
use both formats here for the class, either the full name
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#Video
or the shortened prefix name nfo:Video.

This gives the following result:

$ tracker-sparql -p nfo:Video

Properties: 2
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#frameRate
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#frameCount

These properties nfo:frameRate and nfo:frameCount can be used in
more complex queries (see --query).

-n, --list-notifies=CLASS
Returns a list of classes which are notified over D-Bus about
any changes that occur in the database. CLASS does not have to
be supplied here. This is optional and filters the results
according to any argument supplied. With no CLASS, all classes
are listed.

-s, --search=TERM
Returns a list of classes and properties which partially match
TERM in the ontology. This is a case insensitive match, for
example:

$ tracker-sparql -s text

Classes: 4
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#TextDocument
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#PlainTextDocument
http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#PaginatedTextDocument
http://www.tracker-project.org/temp/nmm#SynchronizedText

Properties: 5
http://www.tracker-
project.org/ontologies/tracker#fulltextIndexed
http://www.tracker-
project.org/ontologies/tracker#fulltextNoLimit
http://www.semanticdesktop.org/ontologies/2007/01/19/nie#plainTextContent
http://www.semanticdesktop.org/ontologies/2007/03/22/nmo#plainTextMessageContent
http://www.tracker-project.org/temp/scal#textLocation

-V, --version
Print version.

EXAMPLES

       List all classes

               $ tracker-sparql -q "SELECT ?cl WHERE { ?cl a rdfs:Class }"

       List all properties for the Resources class (see --list-properties)

               $ tracker-sparql -q "SELECT ?prop WHERE {
                    ?prop a rdf:Property ;
                    rdfs:domain                <http://www.w3.org/2000/01/rdf-
              schema#Resource>
               }"

       List all class namespace prefixes

               $ tracker-sparql -q "SELECT ?prefix ?ns WHERE {
                    ?ns a tracker:Namespace ;
                    tracker:prefix ?prefix
               }"

       List all music files

                $  tracker-sparql  -q  "SELECT   ?song   WHERE   {   ?song   a
              nmm:MusicPiece }"

       List all music albums

               $ tracker-sparql -q "SELECT ?album ?title COUNT(?song)
                                   AS songs
                                   SUM(?length) AS totallength
                                   WHERE {
                    ?album a nmm:MusicAlbum ;
                    nie:title ?title .
                    ?song nmm:musicAlbum ?album ;
                    nfo:duration ?length
               } GROUP BY ?album"

       List all music from a particular artist

               $ tracker-sparql -q "SELECT ?song ?title WHERE {
                    ?song nmm:performer [ nmm:artistName 'Artist Name' ] ;
                    nie:title ?title
               }"

       Set the played count for a song

               $ tracker-sparql -u -q "DELETE {
                    <file:///home/user/Music/song.mp3> nie:usageCounter ?count
               } WHERE {
                    <file:///home/user/Music/song.mp3> nie:usageCounter ?count
               } INSERT {
                    <file:///home/user/Music/song.mp3> nie:usageCounter 42
               }"

       List all image files

                $  tracker-sparql -q "SELECT ?image WHERE { ?image a nfo:Image
              }"

       List all image files with a specific tag

               $ tracker-sparql -q "SELECT ?image WHERE {
                    ?image a nfo:Image ;
                    nao:hasTag [ nao:prefLabel 'tag' ]
               }"

       List all image files created on a specific month and order by date

               $ tracker-sparql -q "SELECT ?image ?date WHERE {
                    ?image a nfo:Image ;
                    nie:contentCreated ?date .
                    FILTER (?date >= '2008-07-01T00:00:00' &&
                            ?date <  '2008-08-01T00:00:00')
               } ORDER BY ?date"

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

EXAMPLES

SEE ALSO