LDAP authentication with uid

Hello, This is a real newbie question ::) I have configured apache httpd to use LDAP for basic authentication (userid and password).  I am not sure what the directory DN should look like when using "uid" rather than "cn"?

In my LDAP directory I have:

dn: cn=Christine Smith,ou=ELOGAccounts,ou=RavenApps,dc=my-domain,dc=com objectClass: top objectClass: person objectClass: organizationalPerson objectClass: uidObject cn: Christine Smith sn: Smith uid: christine userPassword:: Y2hyaXN0aW5l

Where do I put the "uid" so that when the httpd sends over the uid the ldap server will search on it?

Thank you,Mary