> Ron Bourret writes:
>
> > To indicate a PCDATA-only element, I use a PCData element while John
> > uses an empty MIXED element. Although the PCData element is not
> > strictly necessary, I think the commonality of PCDATA-only content
> > makes it useful.
>
> I was thinking that PCDATA-only content is not so common. Most of
> the time, textual elements contain fancy-text information like bold,
> italic, or whatever. Pure plain text with no markup allowed probably
> makes the most sense in title elements and such.
Content models of PCDATA and EMPTY represent the terminals in DTDs. That is,
bold, italic, etc. have a PCDATA content model. Furthermore, in more data (as
opposed to document) applications of XML, PCDATA-only content seems to be
relatively common. For the moment, I have left PCData in and required Mixed to
take at least one ElementRef, per your earlier suggestion.
-- Ron Bourret