(tag -> word -> count)
how many different word types does a tag have to be seen with to be considered open.
How many times do we have to see a word before we decide we know its tag set? Words with counts below this will be allowed to be any open tag in addition to their observed tag set.
(Since version ) see corresponding Javadoc for more information.
A simple lexicon that thresholds to decide when to open up the rare word to all (open) tags