Package specan provides the defined values, interfaces, structs, methods, and
enums that are common among all instruments meeting the IVI-4.8: IviSpecAn Class
Specification, Revision 2.0 dated March 3, 2017.
Files are split based on the class capability groups listed in Table 2-1
IviSpecAn Group Names in the IVI-4.8 IviSpecAn Class Specification.