[Gmsh] mesh format question

[August Winkelman - TNW]

Hi
a beginners question about the mesh file format.
I took the first 4 lines of the elements in the tutorial t1.msh (generated under windows).
To me it seems like elements 3 and 4  (type1) should have 3 tags but there is one number too much it seems. 
I suppose in element 3 the tags are 99, 1 and 0: what is the 1 before 5, if 5 is the node number list?
 
Element 80 shows 6 integers after the numberoftags=3, what are the 4th and 5th representing if the 6th is the nodenumberlist?
 
 
$Elements

821

1 15 2 1 1 1

2 15 2 1 2 2

3 1 3 99 1 0 1 5

4 1 3 99 1 0 5 6

79 1 3 99 4 0 88 1

80 2 3 100 6 0 98 46 45

81 2 3 100 6 0 13 14 99

82 2 3 100 6 0 92 111 112

 

thanks for helping me getting started,

August Winkelman, Delft

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