NAME

RDF::Query::Algebra - Base class for Algebra expressions

VERSION

This document describes RDF::Query::Algebra version 2.200, released 6 August 2009.

referenced_blanks: Returns a list of the blank node names used in this algebra expression.
referenced_functions: Returns a list of the Function URIs used in this algebra expression.
check_duplicate_blanks: Returns true if blank nodes respect the SPARQL rule of no blank-label re-use across BGPs, otherwise throws a RDF::Query::Error::QueryPatternError exception.
qualify_uris ( \%namespaces, $base ): Returns a new algebra pattern where all referenced Resource nodes representing QNames (ns:local) are qualified using the supplied %namespaces.
bind_variables ( \%bound ): Returns a new algebra pattern with variables named in %bound replaced by their corresponding bound values.
is_solution_modifier: Returns true if this node is a solution modifier.
subpatterns_of_type ( $type [, $block] ): Returns a list of Algebra patterns matching $type (tested with isa). If $block is given, then matching stops descending a subtree if the current node is of type $block, continuing matching on other subtrees. This list includes the current algebra object if it matches $type, and is generated in infix order.
from_sse ( $sse, \%context ): Given an SSE serialization, returns the corresponding algebra expression.

 Gregory Todd Williams <gwilliams@cpan.org>