RDF::Redland::Statement(3p)

NAME
RDF::Redland::Statement - Redland RDF Statement Class

SYNOPSIS
  use RDF::Redland;
  my $statement1=new RDF::Redland::Statement($statement);
  my $statement2=new RDF::Redland::Statement($subject,$predicate,$object);
  ...

  if($statement->subject->equals($node)) {
    ...
  }

DESCRIPTION
Manipulate RDF statements which comprise three RDF::Redland::Node objects. Also used for partial statements which can have empty parts and are used for matching statements in statement queries of the model - see the RDF::Redland::Model.

CONSTRUCTORS

new NODE NODE NODE|STATEMENT
    Create a new statement from nodes or copy an existing statement.

    If three NODEs are given, make a new statement from them. Each Node can be a Redland::RDF:Node, a Redland::RDF::URI, a perl URI or a string literal. Otherwise STATEMENT must be an existing statement to copy.

clone
    Copy a RDF::Redland::Statement.

METHODS

subject [SUBJECT]
    Get/set the statement subject. When a RDF::Redland::Node SUBJECT is given, sets the subject of the statement, otherwise returns a reference to the statement RDF::Redland::Node subject.

predicate [PREDICATE]
    Get/set the statement predicate. When RDF::Redland::Node PREDICATE is given, sets the predicate of the statement, otherwise returns a reference to the statement RDF::Redland::Node predicate.

object [OBJECT]
    Get/set the statement object. When RDF::Redland::Node OBJECT is given, sets the object of the statement, otherwise returns a reference to the statement RDF::Redland::Node object.

as_string
    Return the statement formatted as a string (UTF-8 encoded).

equals STATEMENT
    Return non zero if this statement is equal to STATEMENT

OLD METHODS

new_from_nodes SUBJECT PREDICATE OBJECT
    Create a new RDF::Redland::Statement with the given RDF::Redland::Node objects as parts (or undef when empty for a partial statement). Use instead:

      $a=new RDF::Redland::Statement($subject, $predicate, $object);

new_from_statement STATEMENT
    Create a new RDF::Redland::Statement object from RDF::Redland::Statement STATEMENT (copy constructor). Use instead:

      $s=$old_statement->clone;

SEE ALSO
RDF::Redland::Node

AUTHOR
Dave Beckett - http://www.dajobe.org/