Dirk,
Thanks for the information.
I too have registered IDs in the past, and I too couldn't see the ones that I registered via the site today. When I registered in the past, I seem to remember only having to register the IDs themselves; but in the latest incarnation of the registration page, one has to register the four character ID and a name. Apparently, if either is taken, then one cannot register it.
The reason that I ask about properties/parameters is that the property names that I was hoping to use were not available (I wanted to use the names "ID" and "description"); I believe that the four character IDs I chose were unique and OK, but the names associated with the IDs were not available.
In my very limited understanding of the scripting implementation, I was thinking that since property IDs were reusable between scripting events, that I wouldn't need to register them. Shrug.
Cheers!
-- Jim