GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  RDF::TRINE::VARIABLEBINDINGS (3)

.ds Aq ’

NAME

RDF::Trine::VariableBindings - Variable bindings

CONTENTS

VERSION

This document describes RDF::Trine::VariableBindings version 1.014

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.
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 RDF::TRINE::VARIABLEBINDINGS (3) 2015-05-17

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.