RDF::Query::Algebra::BasicGraphPattern - Algebra class for BasicGraphPattern patterns
This document describes RDF::Query::Algebra::BasicGraphPattern version 2.918.
Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.
new ( @triples )
Returns a new BasicGraphPattern structure.
construct_args
Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
triples
Returns a list of triples belonging to this BGP.
quads
Returns a list of the (implicit) quads belonging to this BGP.
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.
connected
Returns true if the pattern is connected through shared variables, false otherwise.
subsumes ( $pattern )
Returns true if the bgp subsumes the pattern, false otherwise.
bf ()
Returns a string representing the state of the nodes of the triple (bound or free).
clone
bind_variables ( \%bound )
Returns a new algebra pattern with variables named in %bound replaced by their corresponding bound values.
Gregory Todd Williams <gwilliams@cpan.org>