NAME
RDF::Query::Algebra::BasicGraphPattern - Algebra class for BasicGraphPattern patterns
VERSION
This document describes RDF::Query::Algebra::BasicGraphPattern version 2.200, released 6 August 2009.
METHODS
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.
sse-
Returns the SSE string for this alegbra expression.
as_sparql-
Returns the SPARQL string for this alegbra expression.
type-
Returns the type of this algebra expression.
referenced_variables-
Returns a list of the variable names used in this algebra expression.
definite_variables-
Returns a list of the variable names that will be bound after evaluating 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.
fixup ( $query, $bridge, $base, \%namespaces )-
Returns a new pattern that is ready for execution using the given bridge. This method replaces generic node objects with bridge-native objects.
connected-
Returns true if the pattern is connected through shared variables, fase 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).
clonebind_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>