RDF::Trine::Node::Literal - RDF Node class for literals
This document describes RDF::Trine::Node::Literal version 1.019
Beyond the methods documented below, this class inherits methods from the RDF::Trine::Node class.
new ( $string, $lang, $datatype, $canonical_flag )
Returns a new Literal structure.
literal_value
Returns the string value of the literal.
literal_value_language
Returns the language tag of the ltieral.
literal_datatype
Returns the datatype of the literal.
value
Returns the literal value.
sse
Returns the SSE string for this literal.
as_string
Returns a string representation of the node.
as_ntriples
Returns the node in a string form suitable for NTriples serialization.
type
Returns the type string of this node.
has_language
Returns true if this literal is language-tagged, false otherwise.
has_datatype
Returns true if this literal is datatyped, false otherwise.
equal ( $node )
Returns true if the two nodes are equal, false otherwise.
canonicalize
Returns a new literal node object whose value is in canonical form (where applicable).
canonicalize_literal_value ( $string, $datatype, $warn )
If $datatype is a recognized datatype, returns the canonical lexical representation of the value $string. Otherwise returns $string.
$datatype
$string
Currently, xsd:integer, xsd:decimal, and xsd:boolean are canonicalized. Additionally, invalid lexical forms for xsd:float, xsd:double, and xsd:dateTime will trigger a warning.
is_canonical_lexical_form
is_valid_lexical_form
Returns true if the node is of a recognized datatype and has a valid lexical form for that datatype. If the lexical form is invalid, returns false. If the datatype is unrecognized, returns zero-but-true.
is_numeric_type
Returns true if the literal is a known (xsd) numeric type.
numeric_value
Returns the numeric value of the literal (even if the literal isn't a known numeric type.
Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/perlrdf/issues.
Gregory Todd Williams <gwilliams@cpan.org>
<gwilliams@cpan.org>
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.
To install RDF::Trine, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Trine
CPAN shell
perl -MCPAN -e shell install RDF::Trine
For more information on module installation, please visit the detailed CPAN module installation guide.