A set of LaTeX macros that makes it easy to produce linguistic tree diagrams suitable for Role and Reference Grammar (RRG). This package allows the construction of trees with crossing lines, as is required by this theory for many languages. There is no known limit on number of tree nodes or levels.

Requires the pst-node and pst-tree LaTeX packages.

The author is David Gardner. The package is Copyright © 2001-2004 D. J. Gardner.