[exim] LDAP for Mail routing

Hi

I would like to look into adding mail routing handling to LDAP for my
Exim MTA.

Does anyone know of any links or, even better, is prepared to share
their schema.

Ive looked at Postfix and Qmails docs, but I would like too a Exim real
world / working example.

If anyone can help, thank you in advance.

Kind Regards
Brent Clark