File format of .sh-file from topology optimization

Hi all,

I am trying to understand the file format of the result output file of a topology optimization run (.sh file).

 

Is there a resource where the format is explained?

 

Below is an example. I understand that starting from the third line is the element ID and its corresponding density value below. What's the '1' next to the element ID? The component?

What is the content of the second line?

What's the stuff in the five lines before 'individual move limits' ?

I know what the move limits are, but what is the order of the thousands of move limit values?

 2019.1                              31994        16         0         0     31994         0 -1.23400E+03         8       5645         1   1.00000E-02       5646         1   1.00000E-02       5647         1   7.52500E-01 . . .      37637         1   1.00000E-02      37638         1   1.00000E-02          2         1         0         0         0         0         0     31994          1      6182         0         0         0         0         0      6964          1         0         0         0         1         0   3.000000000E+00  3.000000000E+00  5.000000000E-01  4.282843323E-01   1.000000000E+00  1.000000000E+00  0.000000000E+00 individual move limits   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01   5.000000000E-01  5.000000000E-01  5.000000000E-01  5.000000000E-01 . . .  0.000000000E+00  1.000000000E+00  0.000000000E+00  0.000000000E+00   0.000000000E+00  1.000000000E+00  1.000000000E+00  0.000000000E+00   0.000000000E+00  0.000000000E+00  1.000000000E+00  0.000000000E+00   0.000000000E+00  0.000000000E+00  1.000000000E+00          0         0