1.7 Vendor-Extensible Fields
The generating component and detection location as specified in section 1.3 are vendor-extensible. Generating components in the inclusive range of 0 to 255 are reserved by Microsoft. A vendor SHOULD define new generating components by using any value that is not reserved by Microsoft. This specification does not prescribe how vendors can avoid collisions in the generating components they choose.
A vendor SHOULD NOT use a detection location from a generating component that is not provided by that vendor.