debian man page for rdf::trine::variablebindings

RDF::Trine::VariableBindings(3pm)			User Contributed Perl Documentation			 RDF::Trine::VariableBindings(3pm)

NAME
       RDF::Trine::VariableBindings - Variable bindings

VERSION
       This document describes RDF::Trine::VariableBindings version 1.000

SYNOPSIS
	 use RDF::Trine qw(literal);
	 use RDF::Trine::VariableBindings;
	 my $vb = RDF::Trine::VariableBindings->new( {} );
	 $vb->set( foo => literal("bar") );
	 $vb->set( baz => literal("blee") );
	 $vb->variables; # qw(foo baz)

	 my $x = RDF::Trine::VariableBindings->new( { foo => literal("bar") } );
	 $x->set( greeting => literal("hello") );

	 my $j = $vb->join( $x ); # { foo => "bar", baz => "blee", greeting => "hello" }

	 my @keys = qw(baz greeting);
	 my $p = $j->project( @keys ); # { baz => "blee", greeting => "hello" }
	 print $p->{greeting}->literal_value; # "hello"

DESCRIPTION
       RDF::Trine::VariableBindings objects provide a mapping from variable names to RDF::Trine::Node objects. The objects may be used as a hash
       reference, with variable names used as hash keys.

METHODS
       "new ( \%bindings )"
       "set ( $variable_name => $node )"
       "join ( $row )"
	   Returns a new VariableBindings object based on the join of this object and $row.  If the two variable binding objects cannot be joined,
	   returns undef.

       "variables"
       "project ( @keys )"
	   Returns a new binding with values for only the keys listed.

       "as_string"
	   Returns a string representation of the variable bindings.

       "label ( $label => $value )"
	   Sets the named $label to $value for this variable bindings object.  If no $value is given, returns the current label value, or undef if
	   none exists.

       "copy_labels_from ( $vb )"
	   Copies the labels from $vb, adding them to the labels for this object.

BUGS
       Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/perlrdf/issues>.

AUTHOR
	Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT
       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms
       as Perl itself.

perl v5.14.2							    2012-06-29					 RDF::Trine::VariableBindings(3pm)