Xy-pic
<graphics, publication> A package for typesetting graphs and diagrams using
TeX.
It is structured as several modules, each defining a custom notation for a particular kind of graphical object or structure.
Example objects are arrows, curves, and frames.
These can be organised in matrix,
directed graph, path, polygon, knot, and 2-cell structure.
Xy-pic works with
LaTeX, AMS-LaTeX, AMS-TeX, and
plain TeX, and has been used to typeset complicated diagrams from many application areas including category theory,
automata theory,
algebra, neural networks and
database theory.
Home (http://www.ens-lyon.fr/~krisrose/Xy-pic.html).
