[code] 0 [Name] InternAtom [Dir] Both [Description] 
The session_id is used as the Atom to be defined (offset by 0x2000), so a value of 0 is defining ID 0x2000). The fragment_size field is the length of the UTF-8 encoded string. The fragment itself contains the string to be interned. This allows the interning of 256 strings. (is this enough?).