NAME

RDF::Core::Model - RDF model

SYNOPSIS

  my $storage = new RDF::Core::Storage::Memory;
  my $model = new RDF::Core::Model (Storage => $storage);
  my $subject = new RDF::Core::Resource('http://www.gingerall.cz/employees/Jim');
  my $predicate = $subject->new('http://www.gingerall.cz/rdfns#name');
  my $object = new RDF::Core::Literal('Jim Brown');
  my $statement = new RDF::Core::Statement($subject, $predicate, $object);

  $model->addStmt($statement);

  print "Model contains ".$model->countStmts."statement(s).\n"

DESCRIPTION

Model provides interface to store RDF statements, ask about them and retrieve them back.

Interface

• new(%options)

  $options is a hash reference, available options are

  • Storage

    a reference to a RDF::Core::Storage implementation

• getOptions

• setOptions(\%options)

• addStmt($statement)

  Add RDF::Core::Statement instance to Model, unless it already exists there.

• removeStmt($statement)

  Remove statement from Model, if it's there.

• existsStmt($subject,$predicate,$object)

  Check if statement exists, that matches given mask. Parameters can be undefined, every value matches undefined parameter.

• countStmts($subject,$predicate,$object)

  Count matching statements.

• getStmts($subject,$predicate,$object)

  Retrieve matching statements. Returns RDF::Core::Enumerator object.

• getObjects($subject, $predicate)

  Return a reference to an array keeping all objects, that are values of specified $predicate for given $subject.

• getContainerObjects($container)

  Return a reference to an array keeping all objects, that are members of the $container. Objects are sorted.

LICENSE

This package is subject to the MPL (or the GPL alternatively).

AUTHOR

Ginger Alliance, rdf@gingerall.cz

SEE ALSO

RDF::Core::Statement, RDF::Core::Storage, RDF::Core::Serializer, RDF::Core::Parser, RDF::Core::Enumerator