NAME

RDF::Query::Algebra::Exists - Algebra class for EXISTS and NOT EXISTS patterns

VERSION

This document describes RDF::Query::Algebra::Exists version 2.902_01.

new ( $pattern, $pattern, $exists, $not_flag ): Returns a new EXISTS structure for the specified $pattern. If $not_flag is true, the pattern will be interpreted as a NOT EXISTS pattern.
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 not-pattern joins.
exists_pattern: Returns the not-pattern (RHS).
not_flag: Returns true if the pattern is a NOT EXISTS pattern.
sse: Returns the SSE string for this alegbra expression.
as_sparql: Returns the SPARQL string for this alegbra expression.
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.
binding_variables: 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 RDF::Query

perl -MCPAN -e shell
install RDF::Query

For more information on module installation, please visit the detailed CPAN module installation guide.

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