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rdf::trine::node::literal(3pm) [debian man page]

RDF::Trine::Node::Literal(3pm)				User Contributed Perl Documentation			    RDF::Trine::Node::Literal(3pm)

NAME

       RDF::Trine::Node::Literal - RDF Node class for literals

VERSION

       This document describes RDF::Trine::Node::Literal version 1.000

METHODS

       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_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.

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::Node::Literal(3pm)

Check Out this Related Man Page

RDF::Trine::Node::Formula(3pm)				User Contributed Perl Documentation			    RDF::Trine::Node::Formula(3pm)

NAME

       RDF::Trine::Node::Formula - RDF Node class for formulae / graph literals

DESCRIPTION

       Formulae are implemented as a subclass of literals. Parts of Trine that have no special knowledge about formulae (e.g. the Turtle
       serialiser) will just see them as literals with a particular datatype URI (http://open.vocab.org/terms/Formula).

       If your code needs to detect formulae nodes, try:

	 use Scalar::Util qw[blessed];
	 if (blessed($node) && $node->isa('RDF::Trine::Node::Formula'))
	   { ... do stuff to formulae ... }

       or perhaps

	 use Scalar::Util qw[blessed];
	 if (blessed($node) && $node->can('pattern'))
	   { ... do stuff to formulae ... }

METHODS

       "new ( $pattern )"
	   Returns a new Formula structure. This is a subclass of RDF::Trine::Node::Literal.

	   $pattern is an RDF::Trine::Pattern or a string capable of being parsed with RDF::Trine::Parser::Notation3->parse_formula.

       "pattern ( $node )"
	   Returns the formula as an RDF::Trine::Pattern.

       "forAll"
	   Returns the a list of nodes with the @forAll quantifier.

	   This is a fairly obscure bit of N3 semantics.

       "forSome"
	   Returns the a list of nodes with the @forSome quantifier.

	   This is a fairly obscure bit of N3 semantics.

       "as_literal_notation"
	   Returns the formula in Notation-3-like syntax, excluding the wrapping "{"..."}".

	   Uses absolute URIs whenever possible, avoiding relative URI references, QNames and keywords.

       "from_literal_notation ( $string, $base )"
	   Modifies the formula's value using Notation 3 syntax, excluding the wrapping "{"..."}".

       "equal ( $node )"
	   Returns true if the two nodes are equal, false otherwise.

	   TODO - really need a "not equal, but equivalent" method.

AUTHOR

       Toby Inkster  "<tobyink@cpan.org>"

       Based on RDF::Trine::Node::Literal by Gregory Todd Williams.

COPYRIGHT AND LICENCE

       Copyright (c) 2006-2010 Gregory Todd Williams.

       Copyright (c) 2010-2011 Toby Inkster.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

DISCLAIMER OF WARRANTIES

       THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
       MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

perl v5.14.2							    2011-10-22					    RDF::Trine::Node::Formula(3pm)
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