[ldap] FIrst mail, and it's a cry for help

[Alister Forbes]

All,

I'm ini the position at $WORK where we are going to be implementing ldap as a 
NIS replacement.  Unfortunately, I also need to use some schemas that already 
exist in the AD world.  I have the schema's as ldif, but when I try to add them 
, I get this error:

ldap_add: Invalid syntax (21)
        additional info: objectClass: value #1 invalid per syntax

value #1 is, I believe classSchema

objectClass: top
objectClass: classSchema

Can anyone tell me where I can find a schema with the definition for 
classSchema in it please?  (or tell me I'm an idiot and show what I'm missing 
out)

Thanks, 
Alister