search.htm
If length is 0
then word match type for all words in a search query is controlled only
by the value of the wm
search parameter value.
With a positive length value,
the words shorter than the given length are searched
using full word match,
even if the wm search parameter tells
to use one of the substring match types:
wm=beg, wm=sub or wm=end.
This can be useful for performance purposes, when
substring match for short words returns too many hits.
The default value is 0.
MaxWordLength,
MinWordLength,
description of the wm search parameter in
the Section called Search parameters
in Chapter 11.