( ((((#pcdata | ((acro | book | emph | location | not | parm | term | var)) | ((super | sub)) | ((link | xref)) | ((computer | cursor | display | keycap | softkey | user )) | ((footnote | ineqn | ingraphic | fillin)) | ((nobreak)))*)) | graphic | eqn | lablist | list | syntax | ex | vex | image | newline | tnote | tnoteref))+
(tnote | tnoteref)