LDAP schema for kaddressbook?

[Jim MacBaine <jmacbaine@gmail.com>]

Hello,

recently I moved my contacts and addresses, which I manage with
kaddressbook, from the local file-based backend to my ldap server.
This works quite well in general, but unfortunately kaddressbook is
unable to save some extended properties like the date of birth or
instant messaging addresses to the ldap backend.

Kaddressbook uses the inetOrgPerson object class, which does not
support these attributes. Is there a schema, that would allow
kaddressbook to store _all_ properties of my contacts on the ldap
backend?

Any help is greatly appreciated,
Jim