How to use CKO_VENDOR_DEFINED in pkcs#11

Question

Has anyone used CKO_VENDOR_DEFINED to create a key or a data object?

There is hardly any documentation (including the mother load from Oasis) about how to do it, or

Answer 1

You can take a look at OpenPGP extension to PKCS #11 where CKC_OPENPGP is defined as:

#define CKC_OPENPGP  (CKC_VENDOR_DEFINED|0x00504750)

I've seen also commercial implementations introducing CK*_VENDOR_DEFINED extensions this way.