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Re: Cross-purpose SEQUENCE/CHOICE protocol extension fields
On 8-Nov-04, at 7:48 PM, Steven Legg wrote:
If one follows the ASN.1 rules for extensibility then a known
element will never follow an unknown element.
Surely that is not true. If there is an extension marker in
the base specification, that's where extensions go; there is
no requirement that it be at the end. Furthermore, there might
be an extensible CHOICE in the middle of a SEQUENCE.
X.680 (07/2002), 48.1 (just after a note that extension markers
have no effect on BER); "The extension marker ... makes no statement
as to how such additions should be handled other than that they
should not be treated as an error during the decoding process."