Gregory Todd Williams > RDF-Query > RDF::Query::Algebra::BasicGraphPattern

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Module Version: 2.911   Source  

NAME ^

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

VERSION ^

This document describes RDF::Query::Algebra::BasicGraphPattern version 2.911.

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>
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