(10 (zone-id first-index last-index type ND)( x1 y1 z1 x2 y2 z2 . . . ))
For example: (10 (0 1 2d5 1 2))
ND is an optional argument that indicates the dimensionality of the node data, where ND is 2 or 3.
If the number of dimensions in the grid is two, as specified by the node header, then only and coordinates are present on each line.
(10 (1 1 2d5 1 2)( 1.500000e-01 2.500000e-02 1.625000e-01 1.250000e-02 . . . 1.750000e-01 0.000000e+00 2.000000e-01 2.500000e-02 1.875000e-01 1.250000e-02 ))
Because the grid connectivity is composed of integers representing pointers (see Cells and Faces), using hexadecimal conserves space in the file and provides for faster file input and output. The header indices are in hexadecimal so that they match the indices in the bodies of the grid connectivity sections. The zone-id and type are also in hexadecimal for consistency.