Specific Delays from one group to another
 
 
Qualifying predefined groups to create path-specific constraints:
TIMESPEC TS_FIFOS =      FROM:RAMS(FIFORAM<*>):TO:FFS(MY_REG*):25;
Note: The pattern matching is on the output signal of the FFS/RAMS, not the symbol name.  Use INST to pattern  match on the symbol name.