|   | Cryptographic Token Interface Standard | PKCS#11 | 
| Data Fields | |
| CK_BYTE | major | 
| major version number (the integer portion of the version). More... | |
| CK_BYTE | minor | 
| minor version number (the hundredths portion of the version). More... | |
| major | major version number (the integer portion of the version) | 
| minor | minor version number (the hundredths portion of the version) | 
For version 1.0, major = 1 and minor = For version 2.1, major = 2 and minor = 10. Table 9 below lists the major and minor version values for the officially published Cryptoki specifications.
Table 9, Major and minor version values for published Cryptoki specifications
| Version | major | minor | 
| 1.0 | 0x01 | 0x00 | 
| 2.01 | 0x02 | 0x01 | 
| 2.10 | 0x02 | 0x0a | 
| 2.11 | 0x02 | 0x0b | 
Minor revisions of the Cryptoki standard are always upwardly compatible within the same major version number.
CK_VERSION_PTR is a pointer to a CK_VERSION.
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| major version number (the integer portion of the version). | 
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| minor version number (the hundredths portion of the version). |