Semi-stable disk format for brisbane-core?

[Ian Clatworthy]

John/Robert,

Thanks for all the great work done last week in the sprint.
As always, it was great to catch up with and learn so much
from you guys.

Can you please outline what decisions we need to still make
before we can make one of the brisbane-core disk formats
stable-ish? I'll like to kick off some *large* conversions
soon (e.g. OOo) and I'd prefer to start that after you think
we're approaching something semi-stable.

Given the testing done and progress made last week, I'm
strongly leaning towards chk255-big without labels (for
chk inventories at least). With Aaron's fix to make
tree-references something that must be explicitly asked for,
I'm guessing we want the subtree serialiser used instead of
the rich-root one as well?

Anything else?

Ian C.