In information systems, these criteria are often extrinsic, like a social security number or universally unique id, which is not interesting from an ontological point of view.
In the case of an electronically filed tax return, the taxpayer has to provide certain specific informationhis social security number for exampleto sign the jurat.
For example, records in two independently developed databases could be matched up by social security number, except when the social security numbers are incorrect, missing, or have changed.
Regulations also were enacted to redact the social security number of reporting seniors (which were written in their entirety) on the personal copies of evaluation reports given to service members.
