From : Miloslav Nic [ nicmila@systinet.com ]
Graphotron - reference
Graphotron is a simple XML language for drawing graphs with XPath.
In this reference basic Graphotron elements are described.
ZvonGraphotron, a freely available Graphotron implementation, is available at download page.
The Graphotron history and a short summary of its features and underlying principles is given at about page. There is also a tutorial to wet your appetite. Graphotron documents can be tailored to a specific output program.
See references below for the relevant information.