tranpose range of column data into row

I have a raw data set that looks like following

ID DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7 DATA8
a 15 3 4 1 13 5 5 6
b 12 15 8 15 10 13 8 4
c 3 1 1 13 9 13 15 13
d 13 3 2 4 3 12 14 8
e 10 12 7 8 1 2 9 10

I want to transpose the data including the header to something like this

ID TYPE DATA
a DATA1 15
a DATA2 3
a DATA3 4
a DATA4 1
a DATA5 13
a DATA6 5
a DATA7 5
a DATA8 6
b DATA1 12
b DATA2 15
b DATA3 8
b DATA4 15
b DATA5 10
b DATA6 13
b DATA7 8
b DATA8 4
c DATA1 3
c DATA2 1
c DATA3 1
c DATA4 13
c DATA5 9
c DATA6 13
c DATA7 15
c DATA8 13
d…
d…
d…
..
…
…
e…
e…
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