T = Type, L = Length, V = Value
Lc = Compressed Length, Vc = Compressed Value
: = optional field, | = mandatory field

+-----------------------------+           +-------------------------+
|    Uncompr. Fixed Header    |           |   Compr. Fixed Header   |
+-----------------------------+           +-------------------------+
+---------+---------+---------+           +---------+
: RCT T   : RCT L   : RCT V   :           : RCT Vc  :
+---------+---------+------.--+           +---------+
: MSGH T  : MSGH L  : MSGH V  :           : MSGH Vc :
+---------+---------+---------+           +---------+
+---------+---------+                     +---------+
| MSGT T  | MSGT L  |                     | Name Vc |
+---------+---------+---------+           +---------+
| Name T  | Name L  | Name V  |    ==>    : EXPT Vc :
+---------+---------+---------+           +---------+---------+
: PTYP T  : PTYP L  : PTYP V  :           : PAYL Lc : PAYL V  :
+---------+---------+---------+           +---------+---------+
: EXPT T  : EXPT L  : EXPT V  :           : VALG Lc : VALG Vc :
+---------+---------+---------+           +---------+---------+
: PAYL T  : PAYL L  : PAYL V  :           : VPAY Lc : VPAY V  :
+---------+---------+---------+           +---------+---------+
: VALG T  : VALG L  : VALG V  :
+---------+---------+---------+
: VPAY T  : VPAY L  : VPAY V  :
+---------+---------+---------+