The global constants for specifying the layout of a generated Universally Unique Identifier (UUID) are listed in the following table.
| Global Constant | Integer Value | Description |
|---|---|---|
| VariantDce | 2 | Distributed Computing Environment, which is the scheme used by Qt C++ application development framework, and which is the recommended variant to pass to the generateUuid method |
| VariantMicrosoft | 3 | Reserved for Microsoft backward compatibility (GUID) |
| VariantNcs | 1 | Reserved for NCS (Network Computing System) backward compatibility |