clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
(* Title: HOL/MicroJava/DFA/Semilattices.thy
Author: Gerwin Klein
Copyright 2003 TUM
*)
section {* Semilattices *}
(*<*)
theory Semilattices
imports Err Opt Product Listn
begin
end
(*>*)