The mark-up type SUB is a member of the class MarkUpType. Each object of class SUB is also a member of class MarkUpList.
More general types (whose methods may also apply) :
SUB x -- encloses x in a hypertext SUB item, thereby making it a subscript.
The argument x should be a string, or a list or sequence of strings or hypertext items.
See also:
Methods for using an object of class SUB :