Check the FAQ for answers to common questions like, "Does BOND work with XYZ database?"
Read the Installation guide for installation instructions for Debain and Ubuntu GNU/Linux distributions.
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: