I figured it out. Really the gist is ...
For a document to be considered a match for any phrase say, “quick brown fox”, the following must be true:
-
quick,brown, andfoxmust all appear in the field. - The position of
brownmust be1greater than the position ofquick. - The position of
foxmust be2greater than the position ofquick.
Then the specifics are down to the tokens that are generated.