doc-src/Intro/list.thy

Deleted constQU, exvarQU, expQU by including Const,
ExpVar, Exp in Value.thy's codatatype declaration.

List = FOL +
types 	list 1
arities list	:: (term)term
consts	Nil	:: "'a list"
   	Cons	:: "['a, 'a list] => 'a list" 
end