Hi.
I'm a programmer, and I'm now making a FLAC voice recorder, which can insert markers during recording. The main reason to insert markers is to refer them at the time when user edits the recorded data on Audio Editor, like Sound Forge.

To make my product compatible to Audio Editor markers, I tried to add "CUESHEET" metadata as markers, but it seems Sound Forge doesn't read its information(right?).
So I investigated the FLAC's binary of what Sound Forge exported.
And now, I notice Sound Forge stores markers information in "APPLICATION" metadata with "SONY" ID.(If I am not wrong.)

I searched official FLAC page and found this page, but it gave me no information but the link to the Sony Creative Software.
https://xiph.org/flac/id.html
So my question is, is there any documentation about "SONY" "APPLICATION" metadata?
Documentation about each of bytes(or bits) used for what?
I think revealing it would allow many developers to make Sound Forge-compatible application, software, or hardware. Please consider it.
Thanks.