composition-as-dot.md

@@ -31,5 +31,8 @@ Reserve . for use as a qualifier in names. Do not permit . as an operator symbol
 
 - We lose . as composition. Mostly this doesn't matter as $ is probably more common in reality anyway. Perhaps use
   ``o`` as infix composition instead if it is really important.  Note that ``o`` is three characters - it
-  would be nicer to use plain `o` infix, but that would require another special lexical rule.
+  would be nicer to use plain `o` infix, but that would require another special lexical rule.  Others alternatives
+  for composition include [Unicode](unicode) symbols such as centred-dot ˙, a bullet point, an unfilled bullet point, the
+  degree sign °, the masculine ordinal indicator °, stroked circle ø, and so on.  All of these resemble the mathematical
+  symbol, and some of them are available in the Latin-1 subset.
 - We need to make a special case of .. in the \[m .. n\] case.