Interestingly, at least in some flavors, you can do something similar with file 
dictionaries.  In IDEAL flavor you can move I-descriptors to some other file, 
and reference them via "R" (remote) types.  I can't find it documented, but it 
did work when I tried it. I-descriptors are 20+ fields long (maybe many more) 
and can be quite large, especially if the expression is large.  The same 
considerations apply when searching for a dictionary item from a query as for a 
VOC item.  How many of you bother to tune your file dictionaries?  (There is 
another school of thought that says leaving them with modulo 1 forces the 
entire dictionary to be read into memory, leading to more efficient location of 
subsequent items.  But if that were really the case, don't you think the 
default size of the VOC file would be modulo 1 also?)
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