Maria, I had a similar problem and fixed it with the following hack: I 
added a new boolean property, "hasInstructorOrCourseNumber" to the 
exhibit data file, then built my div on ex:if-exists 
.hasInstructorOrCourseNumber.  The kind of "denormalization" is a Bad 
Thing according to database engineers but it does provide a quick fix to 
the problem.

Maria McDowell wrote:
> Johan,
> thanks again.  Hmmm, no, I definately meant 'OR'.  And your solution 
> would create
> duplicates, yes?  So if .instructor and .coursenumber BOTH exist, I will
> have both divs, right?  I think that I do not want that, too much code as
> you said, and it will duplicate on the page.  Hmmm.  Need to think on 
> how to
> solve this.
>
> Thanks,
> Maria
>
>
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