Who Puts a Lot of
Information in Directories?. Most directories don't contain much information.
They contain people data -- user names, associated credentials (hashed password,
X.509 certificate), addresses (email, physical, telephony, etc.); group data --
lists employed to associate roles and permissions with people or as email distribution
lists; and sometimes also server/service (physical and logical) data. And that's
just about it.
There are exceptions, however. The notable ones seem to be:
... David Ferris, with thanks to Nick Shelness and Persistent Systems' Sameer Karmarkar