Description
Like
missing value, this is implemented as a class with
no values, and can be used as a placeholder to signal a nonvalue.
I've never found a use for it in communicating with
a scriptable application, nor have I ever seen an application return
it as a result. But I do sometimes use it in my own scripts, as a way
of giving a variable or record item a value to prevent it from being
undefined (and causing an error), without its having any particular
value belonging to a useful class.
Example
set aPerson to {name:null, age:null, town:null}
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