This package proposes a means to remove the limitation of LaTeX's reference system that only two properties are supported. The package implements an extensible referencing system, where properties are handled in a more flexible way. It offers an interface for macro programmers for access to the system and some applications that use the new reference scheme.

The package is part of the oberdiek bundle.

The author is Heiko Oberdiek. The package is Copyright © 2006,2007,2008,2009 Heiko Oberdiek.