В мануале по изодрафту:
для Union даны SKEY и указана конфигурация P-точек.
для SHU:
"SHU elements have a CRFA attribute allowing up to 10 connection points."
"Tapping legs off PCOMs or SHUs can themselves contain PCOMs or SHUs
with tapping legs, up to a maximum limit of 20 levels of nesting."
В мануале по изодрафту:
для Union даны SKEY и указана конфигурация P-точек.
для SHU:
"SHU elements have a CRFA attribute allowing up to 10 connection points."
"Tapping legs off PCOMs or SHUs can themselves contain PCOMs or SHUs
with tapping legs, up to a maximum limit of 20 levels of nesting."