Via Patrick's blog:
"What is the CAML Builder?
CAML itself is the abbreviation of Collaborative Application Markup Language. It is an XML-based query language that helps you querying, building and customizing Web sites based on Windows SharePoint Services. The XML elements define various aspects of a WSS site. In the first version of our CAML Builder tool, only the query aspect of CAML is worked out. The tool will help you build, test and execute your CAML queries.
We provide you with two things:
- A Windows application you can use to connect to your portal or team site and build your CAML query string in a WYSIWYG manner. (U2UCamlCreator.exe)
- A small assembly you can reference helping you with the execution of your CAML query string within your code. (U2U.SharePoint.CAML.Server.dll)
CAML builder is downloadable from our SharePoint site. You just unzip the file and start working with it. We will work out an official article with more guidance info on the stuff you can do with CAML and the tool. But for the moment, if you want to start, here is a small walkthrough demonstrating the possible use of the tool."
Great work (again) at U2U!