Bond Version 2 API Reference
For information regarding xml file formats and how to write your xml files the DTD Definition guide is a good place to start. The paymaster payroll is a good example of what can be done with bond and gives you a idea on how the XML is laid out. There are also serval examples includes with the bond source code.
The bondapi.c/.h and bondmain.c/.h files are the main API interface.
Here are the Reference guides for Bond and Bond's GTK interface:
DTD Definition Guide 2.1
API Reference Guide 2.0
HOWTO Create your first bond application
Installation help
Troubleshooting help
