NAME

RDF::Query::Algebra::Service - Algebra class for SERVICE (federation) patterns

VERSION

This document describes RDF::Query::Algebra::Service version 2.909.

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

new ( $endpoint, $pattern, $silent ): Returns a new Service structure.
construct_args: Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
endpoint: Returns the endpoint resource of the named graph expression.
pattern: Returns the graph pattern of the named graph expression.
silent: Returns true if the service operation is to ignore errors during execution.
lhs: If the SERVCE operation uses a variable endpoint, then it is considered a binary operator, executing the left-hand-side pattern first, and using results from it to bind endpoint URL values to use in SERVICE evaluation.
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).
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.
qualify_uris ( \%namespaces, $base_uri ): Returns a new algebra pattern where all referenced Resource nodes representing QNames (ns:local) are qualified using the supplied %namespaces.

 Gregory Todd Williams <gwilliams@cpan.org>