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Manual Reference Pages  -  RDF::CORE::MODEL (3)

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NAME

RDF::Core::Model - RDF model

CONTENTS

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

o new(%options)

$options is a hash reference, available options are
o Storage

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

o getOptions
o setOptions(\%options)
o addStmt($statement)

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

o removeStmt($statement)

Remove statement from Model, if it’s there.

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

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

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

Count matching statements.

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

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

o getObjects($subject, $predicate)

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

o 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
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perl v5.20.3 RDF::CORE::MODEL (3) 2002-06-12

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