# Differences in the ABC format

## `Header` section

- Versions range from `0x6a` to `0x6c` instead of `0xa` to `0xc`.
- There are four unknown 4-byte words after the command string.

## `Nodes` section

- The section starts with an unknown 4-byte word.

## `Animation` section

- A 4-byte word, always assigned to `0xffffffff`, appears before every
`nodeanim`.
- Aside from its position and rotation vecots, every animation item contains
two extra 4-byte words, apparently always assigned to zero.

## `HitGroups` section

- This sections seems to be an extension to the standard ABC format.
It is defined by two 4-byte words with unknown purpose.