CompressedDataType 
        { iso(1) identified-organization(3) nato(26) stanags(0)
          mmhs(4406) object-identifiers(0) id-mcont(4) 2 }

DEFINITIONS ::=
BEGIN

CompressedData ::= SEQUENCE {
    compressionAlgorithm  CompressionAlgorithmIdentifier,
    compressedContentInfo CompressedContentInfo }

CompressionAlgorithmIdentifier ::= CHOICE {
    algorithmID-ShortForm  [0] IMPLICIT AlgorithmID-ShortForm,
    algorithmID-OID        [1] IMPLICIT OBJECT IDENTIFIER }

AlgorithmID-ShortForm ::= INTEGER  {
    zlibCompress (0) }

CompressedContentInfo ::= SEQUENCE {
    contentType CHOICE { 
        contentType-ShortForm  [0] IMPLICIT ContentType-ShortForm,
        contentType-OID        [1] IMPLICIT OBJECT IDENTIFIER
    },
    compressedContent [0] EXPLICIT CompressedContent }

CompressedContent ::= OCTET STRING

ContentType-ShortForm ::= INTEGER  {
    unidentified (0),
    external (1),           -- identified by the object-identifier 
                            -- of the EXTERNAL content 
    p1 (2),
    p3 (3),
    p7 (4) }

END