The Model document calls this printer description attribute, 'operations-supported'.
>>> <kugler at us.ibm.com> 01/04/99 02:05PM >>>
> 188.8.131.52 Validate operation identifier
> The Printer object checks to see if the "operation-id" attribute supplied
> by the client is supported as indicated in the Printer object's
> "printer-operations-supported" attribute.
However, draft-ietf-ipp-model-11 does not define any attribute named