Explain the difference between a mid, attack & d-pole

Hello.

"Mid" is short for "Midfielder."

"Midfield:
The midfielder's responsibility is to cover the entire field, playing
both offense and defense. The midfielder is a key to the transition
game, and is often called upon to clear the ball from defense to
offense. A good midfielder demonstrates good stick work including
throwing, catching and scooping. Speed and stamina are essential. Each
team should have three midfielders on the field."
source: Lacrosse.org
http://www.lacrosse.org/the_sport/mens_rules.phtml


"Attack" is short for "Attackman."

"Attack:
The attackman's responsibility is to score goals. The attackman
generally restricts his play to the offensive end of the field. A good
attackman demonstrates excellent stick work with both hands and has
quick feet to maneuver around the goal. Each team should have three
attackmen on the field during play."
source: Lacrosse.org
http://www.lacrosse.org/the_sport/mens_rules.phtml


"D Pole" is slang for "Defensemen," because the lacrosse stick used by
defensemen is 10-30 inches longer than the standard lacrosse stick
used by attackmen and midfielders.

"Defense:
The defenseman's responsibility is to defend the goal. The defenseman
generally restricts his play to the defensive end of the field. A good
defenseman should be able to react quickly in game situations. Agility
and aggressiveness are necessary, but great stick work is not
essential to be effective. Each team should have three defensemen on
the field."
source: Lacrosse.org
http://www.lacrosse.org/the_sport/mens_rules.phtml


"D Pole" is sometimes used as slang for the defenseman's long lacrosse
stick, but it's also used as shorthand for the defenseman position. 
For example:

"I am the 6'4" 190lb FO middie that also played some D-pole at
camp(Whatever will get me on the field here"
source: NC State Lacrosse messageboard
http://ncsulacrosse.proboards1.com/index.cgi?board=general&action=post&num=1084308930&quote=1086199274

What position do you play?
Attack
Midi
D-Pole
Goalie
source: University of New Hampshire Lacrosse
http://www.unh.edu/menslax/pages/links.html

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search strategy:
lacrosse positions midfielders
"d pole" lacrosse

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Thanks!