This object contains a code which contains
more specific information on the test result,
for example an error-code after a failed
test. Error codes and other values this
object may take are specific to the type of
interface and/or test. However, one subject
identifier:
testCodeUnknown OBJECT IDENTIFIER ::= { 0 0 }
for use if no additional result code is
available.
Note that testCodeUnknown is a
syntactically valid object identifier, and
any conformant implementation of ASN.1 and
the BER must be able to generate and
recognize this value.