Roberto  presented  the DAQ  architecture  and  the  interface to  the
HLT. After the presentation there  was a discussion on the possibility
to  have the  HLT algorithms  off-line. One  can work  on  the events
before  they are  assembled  in the  GDC,  or after  GDC  with a  full
event. The  second possibility is  simpler from the software  point of
view, but depends on the speed and memory requirements of the program.
It  has to  be investigated  in  details. The  compression is  another
important question.  Even in TPC there  could be a possibility to send
data  without compression.  The event  size is  not well  known, there
might be a factor of 3, and  this is the reason to need possibility to
compress. From  the other  hand, if we  can avoid the  compression, we
should do  it. This will speed  up the processing, but  for the moment
the default is  compressed data. Many things will  depend on the noise
level, etc.