I'm assuming asn1c doesn't support Extension Addition Groups as I get an error message with the following but perhaps someone could confirm this. Many thanks.
FooBar {1 2 3 4 5 6} DEFINITIONS ::= BEGIN
ExtAddGrpEg ::= SEQUENCE {
a INTEGER (250..253),
b BOOLEAN,
c BOOLEAN,
...,
[[
g NUMERICSTRING (SIZE (3..3)),
h...
2009-09-13 14:01:18 UTC in The ASN.1 Compiler