Just an observation, I can't verify at the moment if this
is really different from (OS/2) classic REXX. Tracing...
WHATEVER: procedure expose STEM.
...with an unused "STEM." I get symbol( 'STEM.' ) = 'LIT'
before the "procedure expose STEM.", but I get 'VAR'
immediately afterwards. I'd expect 'LIT', but this could
be wrong, maybe 'VAR' is a new "feature" in the standard
for this scenario.
see "contact" in http://purl.net/xyzzy/