Can someone please explain what tr#A-Za-z0-9+/# -_#; means in perl? Post: 302466956

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rdf::query::node

RDF::Query::Node(3pm)					User Contributed Perl Documentation				     RDF::Query::Node(3pm)

NAME

       RDF::Query::Node - Base class for RDF Nodes

VERSION

       This document describes RDF::Query::Node version 2.908.

METHODS

       "is_variable"
	   Returns true if this RDF node is a variable, false otherwise.

       "compare ( $a, $b )"
	   Returns -1, 0, or 1 if $a is less than, equal to, or greater than $b, respectively, according to the SPARQL sorting rules.

       "from_trine ( $node )"
	   Returns a new RDF::Query::Node object with the same value as $node, a RDF::Trine::Node object. This essentially promotes $node to a
	   node object with extra functionality provided by the RDF::Query package (like SPARQL-defined ordering).

       "explain"
	   Returns a string serialization of the node appropriate for display on the command line. This method is primarily used by the "explain"
	   method of the subclasses of RDF::Query::Plan.

FUNCTIONS

       "compare ( $node_a, $node_b )"
	   Returns -1, 0, or 1 if $node_a sorts less than, equal to, or greater than $node_b in the defined SPARQL ordering, respectively. This
	   function may be used as the function argument to "<sort">.

       "iri ( $iri )"
	   Returns a RDF::Query::Node::Resource object with the given IRI value.

       "blank ( $id )"
	   Returns a RDF::Query::Node::Blank object with the given identifier.

       "literal ( $value, $lang, $dt )"
	   Returns a RDF::Query::Node::Literal object with the given value and optional language/datatype.

       "variable ( $name )"
	   Returns a RDF::Query::Node::Variable object with the given variable name.

AUTHOR

	Gregory Todd Williams <gwilliams@cpan.org>

perl v5.14.2							    2012-01-31						     RDF::Query::Node(3pm)