Alberto Attilio Reggiori


RDFStore::Model - An implementation of the Model RDF API using tied hashes and implementing free-text search on literals


        use RDFStore::NodeFactory;
        my $factory= new RDFStore::NodeFactory();
        my $statement = $factory->createStatement(
                                $factory->createLiteral('Cool Web site')
        my $statement1 = $factory->createStatement(
                                $factory->createLiteral("Who? :-)")

        my $statement2 = $factory->createStatement(

        use RDFStore::Model;
        my $model = new RDFStore::Model( Name => 'store', FreeText => 1 );

        my $model1 = $model->duplicate();

        print $model1->getDigest->equals( $model1->getDigest );
        print $model1->getDigest->hashCode;

        my $found = $model->find($statement2->subject,undef,undef);
        my $found1 = $model->find(undef,undef,undef,undef,'Cool'); #free-text search on literals :)

        #get Statements
        foreach ( @{$found->elements} ) {
                print $_->getLabel(),"\n";

        #or faster
        my $fetch;
        foreach ( @{$found->elements} ) {
                my $fetch=$_;  #avoid too many fetches from RDFStore::Model::Statements
                print $fetch->getLabel(),"\n";

        for ( 0..$#{$statements} ) {
                print $statements->[$_]->getLabel(),"\n";

        #get RDFNodes
        foreach ( keys %{$found->elements}) {
                print $found->elements->{$_}->getLabel(),"\n";

        # set operations
        my $set = new RDFStore::Model( Name => 'setmodel' );



An RDFStore::Model implementation using RDFStore(3) to store triplets.


The following methods construct/tie RDFStore::Model storages and objects:

$model = new RDFStore::Model( %whateveryoulikeit );

Create an new RDFStore::Model object and tie up the RDFStore(3). The %whateveryoulikeit hash contains a set of configuration options about how and where store actual data.

Possible additional options are the following:


This is a label used to identify a Persistent storage by name. It might correspond to a physical file system directory containing the indexes DBs. By default if no Name option is given the storage is assumed to be in-memory (e.g. RDFStore::Storage::find method return result sets as in-memory models by default unless specified differently). For local persistent storages a directory named liek this option is created in the current working directory with mode 0666)


Sync the RDFStore::Model with the underling Data::MagciTie GDS after each add() or remove().


Enable free text searching on literals over a model (see find)


Digest(3) RDFStore(3) RDFStore::Digest::Digestable(3) RDFStore::Digest(3) RDFStore::RDFNode(3) RDFStore::Resource(3)


        Alberto Reggiori <>

2 POD Errors

The following errors were encountered while parsing the POD:

Around line 1468:

'=item' outside of any '=over'

Around line 1488:

You forgot a '=back' before '=head1'

You forgot a '=back' before '=head1'