Additional category: CAML
Here is a great posting by a fellow named "craig" on a technique for finding CAML definitions for field content types based off real live definitions from a site.
His posting says it all. In brief:
- Create a content type.
- Associate it with a list.
- Open up the list with SharePoint Designer.
- Export to a "personal web package".
- Rename to a .cab.
- Extract the manifest.
- Find your content type and associated CAML.