PKCS#11 Function enumeration question

From Section 6.1.35 PKCS#11 KMIP 2.0 draft 6

PKCS#11 Function   --  The function to perform. An Enumeration for PKCS#11 defined functions or an Integer for vendor defined function..

Looking at the PKCS#11 2.40 version spec (http://docs.oasis-open.org/pkcs11/pkcs11-base/v2.40/os/pkcs11-base-v2.40-os.html)

Section CK_FUNCTION_LIST; CK_FUNCTION_LIST_PTR; CK_FUNCTION_LIST_PTR_PTR

There is the function list table defined.

typedef struct CK_FUNCTION_LIST {

  CK_VERSION version;

  CK_C_Initialize C_Initialize;

  CK_C_Finalize C_Finalize;

  CK_C_GetInfo C_GetInfo;

  CK_C_GetFunctionList C_GetFunctionList;

  CK_C_GetSlotList C_GetSlotList;

  CK_C_GetSlotInfo C_GetSlotInfo;

  CK_C_GetTokenInfo C_GetTokenInfo;

  CK_C_GetMechanismList C_GetMechanismList;

  CK_C_GetMechanismInfo C_GetMechanismInfo;

  CK_C_InitToken C_InitToken;

  CK_C_InitPIN C_InitPIN;

  CK_C_SetPIN C_SetPIN;

etc...

Is this list zero based or start at one?    The enumeration value for "C_Initialize" is 1 or 0 ?    

Best,

Mark Joseph

P6R, Inc

408-205-0361