NAME¶
RDF::Query::Algebra::Optional - Algebra class for Optional patterns
VERSION¶
This document describes RDF::Query::Algebra::Optional version 2.912.
METHODS¶
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.
AUTHOR¶
Gregory Todd Williams <gwilliams@cpan.org>
