NAME¶

RDF::Query::Algebra::BasicGraphPattern - Algebra class for BasicGraphPattern patterns

VERSION¶

This document describes RDF::Query::Algebra::BasicGraphPattern version 2.919.

METHODS¶

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.

AUTHOR¶

 Gregory Todd Williams <gwilliams@cpan.org>