[ADDITIONS]: Registrant Creation and Modification Dates #18
Description
To parallel the registrationModified attribute type defined within the RASCHEMA I-D, the following types should be added:
firstAuthorityModified(MAY @firstAuthorityContext)currentAuthorityModified(MAY @currentAuthorityContext)sponsorModified(MAY @sponsorContext)
These MULTI-VALUED types operate similarly to registrationModified in that they MAY store multiple modification timestamps, each indicating a point in time during which the relevant registrant data was MODIFIED in some way.
The main use-case for instances of these types is to accommodate IANA's SMI-Registry <person>...</person> instances, which contain MODIFICATION dates.
For CREATION dates, the preexisting firstAuthorityStartTimestamp, currentAuthorityStartTimestamp and sponsorStartTimestamp should be leveraged. No additional types need to be introduced in this context.
The new types are supported in either DEDICATED or COMBINED scenarios, as they rely only upon AUXILIARY class engagement.