THPDFRevisionModificationLevel Type

Grades how severe, in semantic terms, the changes introduced after a signed revision are

Declaration

THPDFRevisionModificationLevel= (rmlNone, rmlLongTermValidation,
  rmlFormFillAndSign, rmlAnnotations, rmlOther);

HPDFDoc

Value	Purpose
`rmlNone`	The revision introduces no semantic change that was detected
`rmlLongTermValidation`	The revision adds nothing beyond validation evidence such as LTV data
`rmlFormFillAndSign`	The revision fills form fields or adds signatures, the class of change most signature policies accept
`rmlAnnotations`	The revision creates, modifies or deletes annotations
`rmlOther`	Any other change, the most restrictive grade open to the classifier

The ordering is deliberate: a larger ordinal is never less restrictive, so policy checks can compare with >= against an allowed ceiling
The classifier propagates the worst child level upwards, and rmlOther prevails over every lower grade where mixed changes appear in one revision
The analysis is structural and policy-aware; cryptographic validity remains the job of signature verification such as VerifyLoadedSignature