Possible enumeration values:

NameValueDescription
RegistrationCount

1

Sort by registration count ascending
RegistrationCountDesc

-1

Sort by registration count descending
HighestSerialNumber

2

Sort by highest serial number ascending
HighestSerialNumberDesc

-2

Sort by highest serial number descending
CreateDate

3

Sort by create date ascending
CreateDateDesc

-3

Sort by create date descending
LastUpdateDate

4

Sort by last update date ascending
LastUpdateDateDesc

-4

Sort by last update date descending