Know what i sawe there?

Look, this is a cube's defenition in wed:

{ // 1
vertices 8
faces 6
696 -440 128 696 440 128 -760 -440 128
-760 440 128 696 -440 72 696 440 72
-760 -440 72 -760 440 72
4 1 0 2 3 : #default ( 1 0 0 0 ) ( 0 -1 0 0 ) : 1001 0 50 ndef
4 0 1 5 4 : #default ( 0 1 0 0 ) ( 0 0 -1 0 ) : 1001 0 50 ndef
4 2 0 4 6 : #default ( 1 0 0 0 ) ( 0 0 -1 0 ) : 1001 0 50 ndef
4 3 2 6 7 : #default ( 0 1 0 0 ) ( 0 0 -1 0 ) : 1001 0 50 ndef
4 1 3 7 5 : #default ( 1 0 0 0 ) ( 0 0 -1 0 ) : 1001 0 50 ndef
4 4 5 7 6 : #default ( 1 0 0 0 ) ( 0 -1 0 0 ) : 1001 0 50 ndef
{
0000
ndef
1
}

What are those cool "ndef"? i tryed to trade the "ndef" by a script name, but nothing happened... (Cool, the player if a hollow cube...!) lol

I cant find any flags here, the other files are encripted.
This is the .$M file