RDF::Query::Algebra::Quad(3pm)

NAME

RDF::Query::Algebra::Quad - Algebra class for Quad patterns

VERSION

This document describes RDF::Query::Algebra::Quad version 2.919.

METHODS

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.

AUTHOR

 Gregory Todd Williams <[email protected]>