NAME

RDF::Core::Storage - An abstract ancestor of storage implementations

SYNOPSIS

use RDF::Core::Storage;

DESCRIPTION

Storage is the place where statements reside. It can add, remove, count and get statements and ask about their existence.

Interface

• new(\%options)

  Options depend on implementation of descendant. (Such as RDF::Core::Storage::Memory, RDF::Core::Storage::DB_File, RDF::Core::Storage::Postgres.)

• addStmt($statement)

  Add RDF::Core::Statement instance to the storage, unless it already exists there.

• removeStmt($statement)

  Remove statement from the storage, if it's there.

• existsStmt($subject,$predicate,$object)

  Check if statement exists, that matches given mask. Parameters can be undefined, every value matches undefined parameter.

• countStmts($subject,$predicate,$object)

  Count matching statements.

• getStmts($subject,$predicate,$object)

  Retrieve matching statements. Returns RDF::Core::Enumerator object. (One of it's descendants.)

LICENSE

This package is subject to the MPL (or the GPL alternatively).

AUTHOR

Ginger Alliance, rdf@gingerall.cz

SEE ALSO

RDF::Core::Storage::Memory, RDF::Core::Storage::DB_File, RDF::Core::Storage::Postgres