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.
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>"
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.