Tha man page for keymgr says that the keymgr generate command (quote) Generates new DNSSEC key and stores it in KASP database. (unquote)

What is exactly stored in the KASP database?

The reason I am asking is because the actual cryptographic key will be available in the clear only when using the default key store. When using an HSM (or event softhsm) only the HSM will have access to the key in the clear. So, what is it that gets stored in the KASP database when an HSM is used for generating keys?