Syntax for Values?

It is unclear what (if any) syntax exists for values in term-based relationships. From this post: http://social.msdn.microsoft.com/Forums/en-US/sqldataqualityservices/thread/0b455a87-f45d-4dab-9e8e-57fdbf005cd9 it seems clear at least optional characters are possible so I have to wonder what is the extent of the syntax here as it is not explicit in the documentation...