NAME

RDF::Query::Algebra::NamedGraph - Algebra class for NamedGraph patterns

VERSION

This document describes RDF::Query::Algebra::NamedGraph version 2.918.

METHODS

Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.

"new ( $graph, $pattern )": Returns a new NamedGraph structure.
"construct_args": Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
"graph": Returns the graph node of the named graph expression.
"pattern": Returns the graph pattern of the named graph expression.
"quads": Returns a list of the quads belonging to this NamedGraph.
"sse": Returns the SSE string for this algebra expression.
"explain": Returns a string serialization of the algebra appropriate for display on the command line.
"as_sparql": Returns the SPARQL string for this algebra expression.
"as_hash": Returns the query as a nested set of plain data structures (no objects).
"as_spin ( $model )": Adds statements to the given model to represent this algebra object in the SPARQL Inferencing Notation (<http://www.spinrdf.org/>).
"type": Returns the type of this algebra expression.
"referenced_variables": Returns a list of the variable names used in this algebra expression.
"potentially_bound": Returns a list of the variable names used in this algebra expression that will bind values during execution.
"definite_variables": Returns a list of the variable names that will be bound after evaluating this algebra expression.
"qualify_uris ( \%namespaces, $base_uri )": Returns a new algebra pattern where all referenced Resource nodes representing QNames (ns:local) are qualified using the supplied %namespaces.
"check_duplicate_blanks": Returns true if blank nodes respect the SPARQL rule of no blank-label re-use across BGPs, otherwise throws a RDF::Query::Error::QueryPatternError exception.

AUTHOR

 Gregory Todd Williams <gwilliams@cpan.org>