sgmls: SGML error at test116.sgm, line 6 in declaration parameter 4:
       "ZZ" not valid short reference delimiter; declaration terminated
sgmls: SGML error at test116.sgm, line 8 at "<":
       Invalid character(s) ignored; attempting to resume DOCTYPE subset
sgmls: Warning at test116.sgm, line 10 at record start:
       Short reference map "MYMAP" used in DTD but not defined
sgmls: SGML error at test116.sgm, line 10 at ">":
       Short reference map for element "DOC" not defined; ignored
       Element structure: DOC