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>