Identifiers on ID Cards

[Dave Huth <Dave.Huth () UTAH EDU>]

I'm wanting to learn more about best practices associated with what
type of identifiers to encode on ID Cards.  There doesn't seem to
be anything in the list archives on this subject - does anyone have
any good references.

The types of questions surround the apporpriate type of identifier
to encode.  For instance is it a wise move to encode things like
Student/Employee ID, Login ID, and those types of identifiers that
are very difficult to change/re-issue; or should the Card be encoded
with an identifier that is re-issueable if the card is lost/stolen
and let a directory link that identifier with an individuals
collection of identity data?

Thanks,

Dave Huth
University of Utah