rdf::redland::iterator(3pm) [debian man page]

RDF::Redland::Iterator(3pm)				User Contributed Perl Documentation			       RDF::Redland::Iterator(3pm)

NAME

       RDF::Redland::Iterator - Redland RDF Iterator Class

SYNOPSIS

	 use RDF::Redland;

	 ...
	 my $iterator=$model->targets_iterator($source_node, $arc_node);
	 while($iterator && !$iterator->end) {
	   my $node=$iterator->current;
	   ...
	   $iterator->next;
	 }

DESCRIPTION

       This class is used to return lists of RDF::Redland::Node objects from a method that returns an RDF::Redland::Iterator - commonly one of the
       get_sources_iterator, get_targets_iterator or get_arcs_iterator methods of the RDF::Redland::Model class.

       This allows efficient retrieval of long lists of RDF::Redland::Node objects but isn't really very Perl-friendly.  The get_sources,
       get_targets or get_arcs methods of RDF::Redland::Model class return Perl lists and the get_source, get_target and get_arc methods return
       single arbitrary results.

CONSTRUCTORS

       No public constructors - are created and returned from various methods of classes including RDF::Redland::Model

METHODS

       end Return non 0 if the iterator has finished

       current
	   Returns the current RDF::Redland::Node object from the iteration or undef if the iteration is finished.

       next
	   Moves the iterator to the next item, returns undef if the iteration is finished.

       context
	   Returns the context RDF::Redland::Node object from the iteration or undef if the iteration is finished.

SEE ALSO

       RDF::Redland::Model and RDF::Redland::Node

AUTHOR

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

perl v5.14.2							    2011-02-04					       RDF::Redland::Iterator(3pm)

RDF::Redland::Statement(3pm)				User Contributed Perl Documentation			      RDF::Redland::Statement(3pm)

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/

perl v5.14.2							    2011-02-04					      RDF::Redland::Statement(3pm)