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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://purl.org/net/dajobe/