NAME

RDF::Query::Algebra::Filter - Algebra class for Filter expressions

VERSION

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

METHODS

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

new ( $expression, $pattern )

Returns a new Filter structure.

construct_args

Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.

expr

Returns the filter expression.

pattern

Returns the filter pattern.

sse

Returns the SSE string for this algebra expression.

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.

is_solution_modifier

Returns true if this node is a solution modifier.

AUTHOR

 Gregory Todd Williams <gwilliams@cpan.org>