To take up Sebastian's remark that M.J. Driscoll's solutionis
SGML-specific and to emulate M. Beddow's enthusiasm for XML, Syd's
suggestion could be enhanced a little
> <rdg wit="E"></rdg>
> I suppose one could be concerned that this solution introduces
> extraneous whitespace, in that an application may be handed a
> space after the contentless (not EMTPY) RDG element, but many
> folks would not consider that a grave concern. (Many modern
> applications are quite addept at s/\s+/ /g.)
The <rdg> element could be typed to facilitate processing.
<rdg type="silent" wit="E"></rdg>
and in an XSLT transform the value of the "type" attribute could be
checked against the content of the <rdg> element and white space striped,
error message generated, a pointer inserted, etc.
Francois Lachance, Scholar-at-large
20th : Machine Age :: 21st : Era of Reparation