I think we should give serious consideration to Mike's suggestion.   If we take
the path we've been considering (this morning) it's essentially a repudiation of
the ZIG direction and attribute architecture.  AA may need some tweaking, but
adjacenyWord, AllWords, and  SomeWords are (now) structure attributes, and
relevance is a comparison attribute. (I would suggest moving the words ones to
comparison.)   So going with something like:
         =*      all of these words
         =?      any of these words
         =.      adjacent words
         =~      relevant words
         ==      exact string match
gives us a much cleaner mapping to AA, and means we don't need separate word and
string indexes.

Anyone else support this?

--Ray


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