+let html_of_matita s =
+ prerr_endline ("input: " ^ s);
+ let patt1 = Str.regexp "\005" in
+ let patt2 = Str.regexp "\006" in
+ let patt3 = Str.regexp "<" in
+ let patt4 = Str.regexp ">" in
+ let res = Str.global_replace patt4 ">" s in
+ prerr_endline ("output: " ^ res);
+ let res = Str.global_replace patt3 "<" res in
+ prerr_endline ("output: " ^ res);
+ let res = Str.global_replace patt2 ">" res in
+ prerr_endline ("output: " ^ res);
+ let res = Str.global_replace patt1 "<" res in
+ prerr_endline ("output: " ^ res);
+ res
+;;
+