- The "graph" feature allows input of data structured as
*directed graphs*to make it easy to produce such pictures as - The "knot" feature allows drawing of mathematical
*knots and links*likesimple link figure 8-knot cinquefoil - The "2cell" feature provides special support for
*categorical twocells*like - The "poly" feature allows
*polygon-like*structures: - The "web" feature allows composition in lattices such as
- The "arc" feature is suitable for effects like

Finally, the following documents might prove useful: *How to Typeset Pretty Diagram Arrows with TeX* [6]
presents some of the design decisions behind Xy-pic,
*Xy-pic and Notation for Categorical
Diagrams* [7] explains how the modularity of Xy-pic
can be used to obtain complex effects with commutative diagrams, and
*Typesetting Neural Nets using Xy-pic* [4] explains how *neural
networks* can be typeset using the package. Finally, a collection of
complex examples is maintained on the Xy-pic home page and the ftp
servers discussed above.

© Kristoffer H. Rose <krisrose@brics.dk> December 19, 1996 / LaTeX2