Attribute Exchange - Questions

[Josh Patterson]

http://www.axschema.org/types/#sreg

Paul and I are working on getting some sandbox code up and running, to
give us a better handle on how to get actual code operational, and I
was reading the AX spec drafts, and I noticed that AX has a section
for "Other Attribute Types", which then goes on to list "LinkedIn URL"
as a type. Am I confused, or does that seem really.... hard coded? I
would think identity would have to be flexible enough to handle future
changes as opposed to saying "linked in is, and will be, how you are
known professionally". I cant find a roadmap for AX, does anyone know
of one?

Josh