I removed this Knol. The development of “Filters on Posets and Generalizations” happens on wikidot.com instead.
I decided to put my draft article “Filters on Posets and Generalizations” at Google Knol to be edited collaboratively by the Internet math community.
The current PDF draft (in fact a very rough draft) is at this URL.
Here it will be at Google Knol.
I welcome you to collaborate. For now, the article is not even copied from PDF to Google Knol. But you may help, now or in the future.