MTAAbstractService {joint-iso-itu-t mhs(6) mts(3) modules(0)
  mta-abstract-service(2) version-1999(1)} DEFINITIONS IMPLICIT TAGS ::=
BEGIN

--	Prologue
--	Exports everything
IMPORTS
  -- Remote Operations
  CONNECTION-PACKAGE, CONTRACT
    --==
    FROM Remote-Operations-Information-Objects {joint-iso-itu-t
      remote-operations(4) informationObjects(5) version1(0)}
  emptyUnbind
    --==
    FROM Remote-Operations-Useful-Definitions {joint-iso-itu-t
      remote-operations(4) useful-definitions(7) version1(0)}
  -- MTS Abstract Service Parameters
  ABSTRACT-ERROR, ABSTRACT-OPERATION, administration, AdministrationDomainName,
    certificate-selectors, certificate-selectors-override, Content,
    ContentIdentifier, ContentLength, ContentType,
    content-confidentiality-algorithm-identifier, content-correlator,
    content-integrity-check, conversion-with-loss-prohibited,
    ConvertedEncodedInformationTypes, CountryName, DeferredDeliveryTime,
    delivery, dl-exempted-recipients, dl-expansion-history,
    dl-expansion-prohibited, ExplicitConversion, EXTENSION, ExtensionField{},
    GlobalDomainIdentifier, InitiatorCredentials, latest-delivery-time,
    message-origin-authentication-check, message-security-label, message-token,
    MHS-OBJECT, MTAName, MTSIdentifier, multiple-originator-certificates,
    ORAddressAndOptionalDirectoryName, OriginalEncodedInformationTypes,
    originator-and-DL-expansion-history, originator-certificate,
    originator-return-address, PerMessageIndicators, physical-delivery-modes,
    physical-delivery-report-request, physical-forwarding-address,
    physical-forwarding-address-request, physical-forwarding-prohibited,
    physical-rendition-attributes, PORT, Priority, PrivateDomainIdentifier,
    PrivateExtensions, probe-origin-authentication-check, proof-of-delivery,
    proof-of-delivery-request, recipient-certificate,
    recipient-number-for-advice, recipient-reassignment-prohibited,
    redirection-history, registered-mail-type, reporting-DL-name,
    reporting-MTA-certificate, reporting-MTA-name, ReportType,
    report-origin-authentication-check, requested-delivery-method,
    ResponderCredentials, SecurityContext, submission,
    SupplementaryInformation, Time
    --==
    FROM MTSAbstractService {joint-iso-itu-t mhs(6) mts(3) modules(0)
      mts-abstract-service(1) version-1999(1)}
  -- IPM Information Objects
  IPMPerRecipientEnvelopeExtensions
    --==
    FROM IPMSInformationObjects {joint-iso-itu-t mhs(6) ipms(1) modules(0)
      information-objects(2) version-1999(1)}
  -- Object Identifiers
  id-cp-mta-connect, id-ct-mta-transfer, id-ot-mta, id-pt-transfer
    --==
    FROM MTSObjectIdentifiers {joint-iso-itu-t mhs(6) mts(3) modules(0)
      object-identifiers(0) version-1999(1)}
  -- Upper Bounds
  ub-bit-options, ub-integer-options, ub-recipients, ub-transfers
    --==
    FROM MTSUpperBounds {joint-iso-itu-t mhs(6) mts(3) modules(0)
      upper-bounds(3) version-1999(1)};

--	Objects
mta MHS-OBJECT ::= {BOTH  {mta-transfer}
                    ID    id-ot-mta
}

--	Contracts
mta-transfer CONTRACT ::= {
  CONNECTION     mta-connect
  OPERATIONS OF  {transfer}
  ID             id-ct-mta-transfer
}

--	Connection package
mta-connect CONNECTION-PACKAGE ::= {
  BIND    mta-bind
  UNBIND  mta-unbind
  ID      id-cp-mta-connect
}

--	Ports
transfer PORT ::= {
  OPERATIONS  {message-transfer | probe-transfer | report-transfer}
  ID          id-pt-transfer
}

--	MTA-bind and MTA-unbind
mta-bind ABSTRACT-OPERATION ::= {
  ARGUMENT  MTABindArgument
  RESULT    MTABindResult
  ERRORS    {mta-bind-error}
}

mta-unbind ABSTRACT-OPERATION ::= emptyUnbind

MTABindArgument ::= CHOICE {
  unauthenticated  NULL, -- if no authentication is required
  authenticated
    [1]  SET {-- if authentication is required--initiator-name
                                                  [0]  MTAName,
                                                initiator-credentials
                                                  [1]  InitiatorCredentials
                                                         (WITH COMPONENTS {
                                                            ...,
                                                            protected  ABSENT
                                                          }),
                                                security-context
                                                  [2]  SecurityContext OPTIONAL
  }
}

MTABindResult ::= CHOICE {
  unauthenticated  NULL, -- if no authentication is required
  authenticated
    [1]  SET {-- if authentication is required--responder-name
                                                  [0]  MTAName,
                                                responder-credentials
                                                  [1]  ResponderCredentials
                                                         (WITH COMPONENTS {
                                                            ...,
                                                            protected  ABSENT
                                                          })}
}

mta-bind-error ABSTRACT-ERROR ::= {
  PARAMETER
    INTEGER {busy(0), authentication-error(2), unacceptable-dialogue-mode(3),
             unacceptable-security-context(4),
             inadequate-association-confidentiality(5)}(0..ub-integer-options)
}

--	Transfer Port
message-transfer ABSTRACT-OPERATION ::= {ARGUMENT  Message
}

probe-transfer ABSTRACT-OPERATION ::= {ARGUMENT  Probe
}

report-transfer ABSTRACT-OPERATION ::= {ARGUMENT  Report
}

Message ::= SEQUENCE {envelope  MessageTransferEnvelope,
                      content   Content
}

Probe ::= ProbeTransferEnvelope

Report ::= SEQUENCE {
  envelope  ReportTransferEnvelope,
  content   ReportTransferContent
}

--	Message Transfer Envelope
MessageTransferEnvelope ::= SET {
  COMPONENTS OF PerMessageTransferFields,
  per-recipient-fields
    [2]  SEQUENCE SIZE (1..ub-recipients) OF PerRecipientMessageTransferFields
}

PerMessageTransferFields ::= SET {
  message-identifier                  MessageIdentifier,
  originator-name                     OriginatorName,
  original-encoded-information-types  OriginalEncodedInformationTypes OPTIONAL,
  content-type                        ContentType,
  content-identifier                  ContentIdentifier OPTIONAL,
  priority                            Priority DEFAULT normal,
  per-message-indicators              PerMessageIndicators DEFAULT {},
  deferred-delivery-time              [0]  DeferredDeliveryTime OPTIONAL,
  per-domain-bilateral-information
    [1]  SEQUENCE SIZE (1..ub-transfers) OF PerDomainBilateralInformation
      OPTIONAL,
  trace-information                   TraceInformation,
  extensions
    [3]  SET OF ExtensionField{{MessageTransferExtensions}} DEFAULT {}
}

MessageTransferExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   recipient-reassignment-prohibited | dl-expansion-prohibited |
   conversion-with-loss-prohibited | latest-delivery-time |
   originator-return-address | originator-certificate |
   content-confidentiality-algorithm-identifier |
   message-origin-authentication-check | message-security-label |
   content-correlator | dl-exempted-recipients | certificate-selectors |
   multiple-originator-certificates | dl-expansion-history |
   internal-trace-information | PrivateExtensions, ...}

PerRecipientMessageTransferFields ::= SET {
  recipient-name                         RecipientName,
  originally-specified-recipient-number
    [0]  OriginallySpecifiedRecipientNumber,
  per-recipient-indicators               [1]  PerRecipientIndicators,
  explicit-conversion                    [2]  ExplicitConversion OPTIONAL,
  extensions
    [3]  SET OF ExtensionField{{PerRecipientMessageTransferExtensions}}
      DEFAULT {}
}

PerRecipientMessageTransferExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   originator-requested-alternate-recipient | requested-delivery-method |
   physical-forwarding-prohibited | physical-forwarding-address-request |
   physical-delivery-modes | registered-mail-type | recipient-number-for-advice
   | physical-rendition-attributes | physical-delivery-report-request |
   message-token | content-integrity-check | proof-of-delivery-request |
   certificate-selectors-override | recipient-certificate | redirection-history
   | IPMPerRecipientEnvelopeExtensions | PrivateExtensions, ...}

--	Probe Transfer Envelope
ProbeTransferEnvelope ::= SET {
  COMPONENTS OF PerProbeTransferFields,
  per-recipient-fields
    [2]  SEQUENCE SIZE (1..ub-recipients) OF PerRecipientProbeTransferFields
}

PerProbeTransferFields ::= SET {
  probe-identifier                    ProbeIdentifier,
  originator-name                     OriginatorName,
  original-encoded-information-types  OriginalEncodedInformationTypes OPTIONAL,
  content-type                        ContentType,
  content-identifier                  ContentIdentifier OPTIONAL,
  content-length                      [0]  ContentLength OPTIONAL,
  per-message-indicators              PerMessageIndicators DEFAULT {},
  per-domain-bilateral-information
    [1]  SEQUENCE SIZE (1..ub-transfers) OF PerDomainBilateralInformation
      OPTIONAL,
  trace-information                   TraceInformation,
  extensions
    [3]  SET OF ExtensionField{{ProbeTransferExtensions}} DEFAULT {}
}

ProbeTransferExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   recipient-reassignment-prohibited | dl-expansion-prohibited |
   conversion-with-loss-prohibited | originator-certificate |
   message-security-label | content-correlator |
   probe-origin-authentication-check | internal-trace-information |
   PrivateExtensions, ...}

PerRecipientProbeTransferFields ::= SET {
  recipient-name                         RecipientName,
  originally-specified-recipient-number
    [0]  OriginallySpecifiedRecipientNumber,
  per-recipient-indicators               [1]  PerRecipientIndicators,
  explicit-conversion                    [2]  ExplicitConversion OPTIONAL,
  extensions
    [3]  SET OF ExtensionField{{PerRecipientProbeTransferExtensions}}
      DEFAULT {}
}

PerRecipientProbeTransferExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   originator-requested-alternate-recipient | requested-delivery-method |
   physical-rendition-attributes | redirection-history | PrivateExtensions, 
   ...}

--	Report Transfer Envelope
ReportTransferEnvelope ::= SET {
  report-identifier        ReportIdentifier,
  report-destination-name  ReportDestinationName,
  trace-information        TraceInformation,
  extensions
    [1]  SET OF ExtensionField{{ReportTransferEnvelopeExtensions}} DEFAULT {}
}

ReportTransferEnvelopeExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   message-security-label | redirection-history |
   originator-and-DL-expansion-history | reporting-DL-name |
   reporting-MTA-certificate | report-origin-authentication-check |
   internal-trace-information | reporting-MTA-name | PrivateExtensions, 
   ...}

--	Report Transfer Content
ReportTransferContent ::= SET {
  COMPONENTS OF PerReportTransferFields,
  per-recipient-fields
    [0]  SEQUENCE SIZE (1..ub-recipients) OF PerRecipientReportTransferFields
}

PerReportTransferFields ::= SET {
  subject-identifier                      SubjectIdentifier,
  subject-intermediate-trace-information
    SubjectIntermediateTraceInformation OPTIONAL,
  original-encoded-information-types
    OriginalEncodedInformationTypes OPTIONAL,
  content-type                            ContentType OPTIONAL,
  content-identifier                      ContentIdentifier OPTIONAL,
  returned-content                        [1]  Content OPTIONAL,
  additional-information                  [2]  AdditionalInformation OPTIONAL,
  extensions
    [3]  SET OF ExtensionField{{ReportTransferContentExtensions}} DEFAULT {}
}

ReportTransferContentExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   content-correlator | PrivateExtensions, ...}

PerRecipientReportTransferFields ::= SET {
  actual-recipient-name                  [0]  ActualRecipientName,
  originally-specified-recipient-number
    [1]  OriginallySpecifiedRecipientNumber,
  per-recipient-indicators               [2]  PerRecipientIndicators,
  last-trace-information                 [3]  LastTraceInformation,
  originally-intended-recipient-name
    [4]  OriginallyIntendedRecipientName OPTIONAL,
  supplementary-information              [5]  SupplementaryInformation OPTIONAL,
  extensions
    [6]  SET OF ExtensionField{{PerRecipientReportTransferExtensions}}
      DEFAULT {}
}

PerRecipientReportTransferExtensions EXTENSION ::=
  {-- May contain the following extensions, private extensions, and future standardised extensions,
   -- at most one instance of each extension type:
   redirection-history | physical-forwarding-address | recipient-certificate |
   proof-of-delivery | PrivateExtensions, ...}

--	Envelope & Report Content Fields
MessageIdentifier ::= MTSIdentifier

OriginatorName ::= ORAddressAndOptionalDirectoryName

PerDomainBilateralInformation ::= SEQUENCE {
  COMPONENTS OF BILATERAL.&id,
  bilateral-information  BILATERAL.&Type
}

BILATERAL ::= CLASS {&id    BilateralDomain UNIQUE,
                     &Type  
}WITH SYNTAX {&Type,
              IDENTIFIED BY &id
}

BilateralDomain ::= SEQUENCE {
  country-name  CountryName,
  domain
    CHOICE {administration-domain-name  AdministrationDomainName,
            private-domain
              SEQUENCE {administration-domain-name
                          [0]  AdministrationDomainName,
                        private-domain-identifier
                          [1]  PrivateDomainIdentifier}}
}

RecipientName ::= ORAddressAndOptionalDirectoryName

OriginallySpecifiedRecipientNumber ::= INTEGER(1..ub-recipients)

PerRecipientIndicators ::= BIT STRING {
  responsibility(0),
  -- responsible 'one', not-responsible 'zero'
  originating-MTA-report(1),
  originating-MTA-non-delivery-report(2),
  -- either originating-MTA-report, or originating-MTA-non-delivery-report,
  -- or both, shall be 'one':
  -- originating-MTA-report bit 'one' requests a 'report';
  -- originating-MTA-non-delivery-report bit 'one' requests a 'non-delivery-report';
  -- both bits 'one' requests an 'audited-report';
  -- bits 0 - 2 'don't care' for Report Transfer Content
  originator-report(3),
  originator-non-delivery-report(4),
  -- at most one bit shall be 'one':
  -- originator-report bit 'one' requests a 'report';
  -- originator-non-delivery-report bit 'one' requests a 'non-delivery-report';
  -- both bits 'zero' requests 'no-report'
  reserved-5(5), reserved-6(6), reserved-7(7)
                                
-- reserved- bits 5 - 7 shall be 'zero' --}(SIZE (8..ub-bit-options))

ProbeIdentifier ::= MTSIdentifier

ReportIdentifier ::= MTSIdentifier

ReportDestinationName ::= ORAddressAndOptionalDirectoryName

SubjectIdentifier ::= MessageOrProbeIdentifier

MessageOrProbeIdentifier ::= MTSIdentifier

SubjectIntermediateTraceInformation ::= TraceInformation

--	AdditionalInformation is retained for backwards compatibility only, 
--	and use in new systems is strongly deprecated
ADDITIONAL ::= CLASS {&Type  
}

AdditionalInformation ::=
  ADDITIONAL.
    &Type -- maximum ub-additional-info octets including all encoding

ActualRecipientName ::= ORAddressAndOptionalDirectoryName

LastTraceInformation ::= SET {
  arrival-time                         [0]  ArrivalTime,
  converted-encoded-information-types
    ConvertedEncodedInformationTypes OPTIONAL,
  report-type                          [1]  ReportType
}

OriginallyIntendedRecipientName ::= ORAddressAndOptionalDirectoryName

--	Extension Fields
originator-requested-alternate-recipient EXTENSION ::= {
  OriginatorRequestedAlternateRecipient,
  IDENTIFIED BY  standard-extension:2
}

OriginatorRequestedAlternateRecipient ::= ORAddressAndOptionalDirectoryName

trace-information EXTENSION ::= {
  TraceInformation,
  IDENTIFIED BY  standard-extension:37
}

internal-trace-information EXTENSION ::= {
  InternalTraceInformation,
  IDENTIFIED BY  standard-extension:38
}

InternalTraceInformation ::=
  SEQUENCE SIZE (1..ub-transfers) OF InternalTraceInformationElement

InternalTraceInformationElement ::= SEQUENCE {
  global-domain-identifier  GlobalDomainIdentifier,
  mta-name                  MTAName,
  mta-supplied-information  MTASuppliedInformation
}

MTASuppliedInformation ::= SET {
  arrival-time    [0]  ArrivalTime,
  routing-action  [2]  RoutingAction,
  attempted       CHOICE {mta     MTAName,
                          domain  GlobalDomainIdentifier} OPTIONAL,
  -- additional-actions --COMPONENTS OF InternalAdditionalActions
}

InternalAdditionalActions ::= AdditionalActions

--	Common Parameter Types
TraceInformation ::=
  [APPLICATION 9]  SEQUENCE SIZE (1..ub-transfers) OF TraceInformationElement

TraceInformationElement ::= SEQUENCE {
  global-domain-identifier     GlobalDomainIdentifier,
  domain-supplied-information  DomainSuppliedInformation
}

DomainSuppliedInformation ::= SET {
  arrival-time      [0]  ArrivalTime,
  routing-action    [2]  RoutingAction,
  attempted-domain  GlobalDomainIdentifier OPTIONAL,
  -- additional-actions --COMPONENTS OF AdditionalActions
}

AdditionalActions ::= SET {
  deferred-time                        [1]  DeferredTime OPTIONAL,
  converted-encoded-information-types
    ConvertedEncodedInformationTypes OPTIONAL,
  other-actions                        [3]  OtherActions DEFAULT {}
}

RoutingAction ::= ENUMERATED {relayed(0), rerouted(1)}

DeferredTime ::= Time

ArrivalTime ::= Time

OtherActions ::= BIT STRING {redirected(0), dl-operation(1)
}(SIZE (0..ub-bit-options))

END -- of MTA Abstract Service