🚀 go-pugleaf

The boolean overlay properties (`window' and `invisible') can't be
toggled among overlapping (in particular, nested) overlays using the
`priority' property, since a nil value is interpreted as "unspecified"
for them.  Either a non-nil distinguished value is needed to indicate
"false", or a complementary property is needed (e.g. `frame' and
`visible').

I'd like to say that I've found the ability to override the other
overlay properties (`face', `mouse-face', et al.)  with the priority
mechanism to be an indispensable feature while implementing a viewer for
SGML documents (which consist of nested text elements).

P.S.  When are the `before-string' and `after-string' overlay properties
      scheduled to be implemented?  And are in-line bitmaps going to be
      added, like in Lucid?
-- 
Kevin Rodgers <kevinr@ihs.com>		Project Engineer
Information Handling Services		Electronic Systems Development
15 Inverness Way East, M/S A203		
Englewood CO 80112 USA			(303) 397-2807[voice]/-2620[fax]