Format:

$1^{\rm st}$ line:

PROOUT

$2^{\rm nd}$ line:

number of kpoints, bands and ions

$3^{\rm rd}$ line:

twice the number of types followed by the number of ions for each type

$4^{\rm th}$ line:

the Fermi weights for each kpoint (inner loop) and band (outer loop)

line 5 - ...:

real and imaginary part of the projection $P_{Nlmn {\bf k}}$ for every lm-quantum number (inner loop), band, ion per type, kpoint and ion-type (outer loop)

below :

augmentation part

and finally:

the corresponding augmentation part of the projections for every lm-quantum number (inner loop), ion per type, ion-type, band and kpoint (outer loop)

This information makes it possible to construct e.g. partial DOSs projected onto bonding and anti-bonding molecular orbitals or the so-called coop ( crystal overlap population function).