Can I get objectclass schema info from the API?

[Ken Witzke <kwitzke@apple.com>]

Folks,

Is there a way to programmatically request through the API the required
attribute types for a new entry creation given the objectclass?

ie. Given that I wish to create a new entry of objectclass="inetorgperson" I
know that I need to create both the "cn" and "sn" entries.
However, let's say that I didn't know but wished to discover this
programmatically on the fly.
Is this possible?

Thanks.

-Ken