RDF::Query::Algebra::Service - Algebra class for SERVICE (federation) patterns
This document describes RDF::Query::Algebra::Service version 2.910.
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>
To install RDF::Query, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Query
CPAN shell
perl -MCPAN -e shell install RDF::Query
For more information on module installation, please visit the detailed CPAN module installation guide.