It might be important to repeat (or at least for me it is) that if one 
wants to use a virtual property that never gets attached to a particular 
object, 
you simply do not ever pass the propertyName in the setprop handler. If you 
do, a custom property with that name will be created, just like a variable 
would be.

Reading Peter Brigham's mail, he never encounters that issue since he never 
expllicitly names an object to which he is setting the virtual property, 
only referrng to "the target". That is nice.

Is it true then, that "set" commands and commands that retrieve custom 
properties are always intercepted by "setprop" and "getProp"? And these will 
not 
pass to the engine unless you let them? Is this the single, or at least the 
most important instance where it is possible to intercept commands? Rev, 
unlike HC, does not normally allow this to happen to reserved words. Here, you 
can, and it seems appropriate.

Craig Newman
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