Each row in a B-E-D file begins with a number that represents a data structure level.
A data structure level means a level of hierarchy between data.
“ROOT” is at level 00.
“NAME” is at level 01.
“Pedro Martins” is at level 02.
00 or 01 or 02 also means that B-E-D file has a max of 100 levels (0-99) for making data structures.