Actually this is a special case of my proposal to support
relational operators. Intersection is one useful operator; some
others are:
* Inverse: absorbing REV into REL
* Product: independent typing of the two link ends
* Join: indirect relationships (e.g., glossary's author)
While "," may be a good notation for Intersection, I don't want to
see the REL value restricted to a comma-separated list.
See my post on "Links and Interactivity" for related comments.
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Paul Burchard <burchard@math.utah.edu>
``I'm still learning how to count backwards from infinity...''
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