It's even more powerful when you can have a length in your header and match the binary length to the value inside the binary The major advantage to all this is

It's even more powerful when you can have a length in your header and match the binary length to the value inside the binary The major advantage to all this is that by being declarative you aren't going to mess up with binary codecs by getting lost in piles if statements to validate your binary lengths and prevent strange packets from messing up your system.