"Scripted documents" is a phrase I coined to describe a file which contains both scripts and data, and which is executable. It's almost like an application with an embedded database. WiKit is built as scripted document. For more details, see the corresponding page on my personal wiki (yah, well, wiki's tend to multiply like rabbits where I live):
http://www.equi4.com/jcw/wiki/ScriptedDocument
-- JC