RDF::Query::Algebra::Quad - Algebra class for Quad patterns
This document describes RDF::Query::Algebra::Quad version 2.914.
Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.
new ( $s, $p, $o, $g )
Returns a new Quad structure.
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).
referenced_blanks
Returns a list of the blank node names used in 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.
bf ()
Returns a string representing the state of the nodes of the triple (bound or free).
distinguish_bnode_variables
Returns a new Quad object with blank nodes replaced by distinguished variables.
label ( $label => $value )
Sets the named $label to $value for this quad object. If no $value is given, returns the current label value, or undef if none exists.
$label
$value
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.