Re: [RFC/PATCH] define the way new representation types are encoded in the pack

> When bit 4-6 encodes type 5, the first byte is used this way:
> 
>  - Bit 0-3 denotes the real "extended" representation type. Because types
>    0-7 can already be encoded without using the extended format, we can
>    offset the type by 8 (i.e. if bit 0-3 says 3, it means representation
>    type 11 = 3 + 8);