Background
I am currently working on a Netbeans Rich Client project that persists its data into XML files. The XML files configure a much larger software system. I needed binding layer to the xml files where I could model the business objects in an XML schema then have the build process generate the tier ( Domain Tier ?) on the fly. It was important that changes could be accomodated through XML schema adjustments rather than client components.

Options
I looked into open source alternatives that would provide the services we were looking for:

1) Lightweight
2) Extensible
3) Simple to use
4) Easy access to the source
5) Would integrate into our build process.
6) Core objects made it easy to make a generic formbuilder

The only libaries I reviewed were:
1) Jaxb
2) XMLBeans
3) Schema2Beans

More to come.....