notations.txt

_t=type
_h=
_c=constant

som=soma
ext=extension

map=binary, int8 or uint8 array (/!\ python keyword; map_ used instead)
bmp=boolean map
lmp=labeled map (intXX or uintXX array)

ep=extension end point, or extremity (e.g. ep_bmp)

n=number of (e.g. n_somas)
nfo=info (e.g. som_nfo)

tintegers=tuple of integers