The question of what kind of ``chad'' constitutes a vote is up in the air again in Florida.

Officials in Palm Beach County _ after a sometimes silly, but ultimately serious debate _ arrived at rules about how much of the paper divot had to be poked out of a punch ballot for a vote to count. But the Florida Democratic Party has filed a lawsuit in circuit court in West Palm Beach to change the rules.

These were the five types of chad recognized in the county. The first three, which are counted as votes, were:

_ Hanging door chad, where one corner is attached.

_ Swinging door chad, with two corners attached.

_ Tri chad, which has three corners attached.

The others, which are not counted, were:

_ Pregnant chad, which bulges but doesn't punch through.

_ Dimple chad, where there is an indentation but no perforation.

The Democrats have asked a judge to declare that dimpled chad are valid.

The so-called chad test was approved in 1990 by the Palm Beach County canvassing board. It says that a chad ``hanging or partially punched may be counted as a vote, since it is possible to punch through the card and still not totally dislodge the chad,'' explained county spokesman Bob Nichols.