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

The package is part of the bundle.

The author is Heiko Oberdiek. The package is Copyright © 2006-2011 Heiko Oberdiek.