SUBTITLE:
Content Model Declaration

Content Rule

((#PCDATA|
  (footnoteref|xref)|
  ((citation|citerefentry|citetitle|emphasis|firstterm|foreignphrase|
    glossterm|footnote|quote|trademark|wordasword))|
  ((link|ulink))|
  ((hardware|mousebutton|systemitem)|
   (action|application|command|computeroutput|email|envar|filename|guibutton|
    guiicon|guilabel|guimenu|guimenuitem|guisubmenu|interface|keycap|keycombo|
    literal|menuchoice|option|optional|parameter|prompt|replaceable|
    returnvalue|userinput))|
  (anchor)|
  (remark|subscript|superscript)|
  (indexterm))+)