exception Error of errorexception DTDError of dtd_errortype token = | Tag of string * (string * string) list * bool | 
| PCData of string | 
| Endtag of string | 
| DocType of string * dtd_decl | 
| Eof | 
val token : Lexing.lexbuf ‑> tokenval dtd : Lexing.lexbuf ‑> Dtd0.dtdval pos : Lexing.lexbuf ‑> posval restore : pos ‑> unit