RDF::Query::Node(3)
Base class for RDF Nodes
VERSION
This document describes RDF::Query::Node version 2.916.
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.