oracular (3) RDF::Query::Node.3pm.gz

NAME

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

VERSION

       This document describes RDF::Query::Node version 2.919.

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).

       "from_attean ( $node )"
           Likewise, but from Attean.

       "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>