World Initialisation and termination of library The Redland #librdf_world class handles startup and termination of the library and cleanup of all allocated resources. @Returns: @world: @world: @world: @world: @user_data: @error_handler: @world: @user_data: @warning_handler: @world: @user_data: @log_handler: @world: @name: @world: @feature: @Returns: @world: @feature: @value: @Returns: @digest_factory_name: @not_used2: