Heading ::= SEQUENCE {
this-EDIM [1] ThisEDIMField,
originator [2] OriginatorField OPTIONAL,
recipients [3] RecipientsField OPTIONAL,
edin-receiver [4] EDINReceiverField OPTIONAL,
responsibility-forwarded [5] ResponsibilityForwarded DEFAULT FALSE,
edi-bodypart-type [6] EDIBodypartType DEFAULT {id-edifact-ISO646},
incomplete-copy [7] IncompleteCopyField DEFAULT FALSE,
expiry-time [8] ExpiryTimeField OPTIONAL,
related-messages [9] RelatedMessagesField OPTIONAL,
obsoleted-EDIMs [10] ObsoletedEDIMsField OPTIONAL,
edi-application-security-elements [11] EDIApplicationSecurityElementsField OPTIONAL
cross-referencing-information [12] CrossReferencingInformationField OPTIONAL,
edi-message-type [13] EDIMessageTypeField OPTIONAL,
service-string-advice [14] ServiceStringAdviceField OPTIONAL,
syntax-identifier [15] SyntaxIdentifierField OPTIONAL,
interchange-sender [16] InterchangeSenderField OPTIONAL,
date-and-time-of-preparation [17] DateAndTimeOfPreparationField OPTIONAL,
application-reference [18] ApplicationReferenceField OPTIONAL,
heading-extensions [19] HeadingExtensionsField OPTIONAL }