RDF::Query::Algebra::Optional - Algebra class for Optional patterns
This document describes RDF::Query::Algebra::Optional version 2.916.
Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.
new ( $pattern, $opt_pattern )
Returns a new Optional structure.
construct_args
Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
pattern
Returns the base pattern (LHS) onto which the optional pattern joins.
optional
Returns the optional pattern (RHS).
sse
Returns the SSE string for this algebra expression.
as_sparql
Returns the SPARQL string for this algebra expression.
as_spin ( $model )
Adds statements to the given model to represent this algebra object in the SPARQL Inferencing Notation (http://www.spinrdf.org/).
as_hash
Returns the query as a nested set of plain data structures (no objects).
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.
Gregory Todd Williams <gwilliams@cpan.org>
To install RDF::Query, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Query
CPAN shell
perl -MCPAN -e shell install RDF::Query
For more information on module installation, please visit the detailed CPAN module installation guide.