[pmwiki-users] empty vs nonexistent PTV in pagelist

[DaveG]

Peter & Melodye Bowers wrote:
> Is there any way to differentiate between an empty PTV and a non-existent
> PTV in a pagelist?
Not that I've found.
   "-?*" represents either empty or not set.
   "-" represents set not empty

> If not, what suggestions for an appropriate syntax to differentiate?
The syntax above is regex like. However, I like:
   "^*" represents not set (regex like)
   "!*" which I prefer -- seems to represent a negated everything -- 
nothing.


  ~ ~ Dave