"Unknown" in .subp is refer to the character

[abuali129]

As I understand so far from .subp, each character had a number that defined him inside the file.
It will be easy to understand that from tape.subp where there is a number before that starting of each line.

[C=15] is miller talking
[C=16] ocelot talking
[C=13] snake talking
[C=37] skull face talking
[C=117] code talker talking
[C=20] Zero talking
etc

but for the rest of subps files, mostly there's no defining of the character in each line text the same way, it is located at the entry header

This line spoken by Ocelot character code 16
<Entry Id="28377578" Priority="28" Flags="770" Unknown="16" AdditionalLength="0">

This line spoken by miller character code 15
<Entry Id="22634616" Priority="14" Flags="771" Unknown="15" AdditionalLength="0">

etc

[Atvaark]

Nice find. Did you figure out what the flags-number is for?

[abuali129]

Still no clue on that, once I figured that out I will be happy to share.

[abuali129]

As for Flags, I'm pretty sure that, Flags="1024", in referring to cut-scene content on all subp. When there's Flags="1024" surely there's a cut-scene text line no doubt about that. For the other Flags="xxx" I still didn't understand the pattern. But Flags is Content with no doubts.