OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual
Object Classes and Attribute Types
OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual—522223-001
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MH-C-MESSAGE
MH-T-CONVERSION-PROHIBITED
Indicates whether the originator prohibited the MTS from converting the message under 
any circumstances.
MH-T-CRITICAL-FOR-DELIVERY
Are integers denoting the attribute types of attributes of this class that have values 
requiring extended processing, which is critical for delivery of the message.
MH-T-CRITICAL-FOR-SUBMISSION
Are integers denoting the attribute types of attributes of this class that have values 
requiring extended processing, which is critical for submission of the message.
MH-T-CRITICAL-FOR-TRANSFER
Are integers denoting the attribute types of attributes of this class that have values 
requiring extended processing, which is critical for transfer of the message.
MH-T-DEFERRED-DELIVERY-TIME
Indicates the earliest date and time that the message should be delivered. Because the 
MD that originates the message is usually responsible for deferring the delivery, 
messages with a value for this attribute are transferred between MDs only by bilateral 
agreement of those MDs.
MH-T-DISCLOSURE-ALLOWED
Indicates whether the O/R names of other recipients are to be disclosed to each recipient 
at delivery.
MH-CTO-INNER-
MESSAGE
Content encodes an object of the Submitted Message class 
according to the rules of X.400 (1988), which include the BER. 
The ASN.1 object identifier is specified by an object ID string 
(the DDL-constant value “\x56\x03\x03\x01”). The originator 
can secure the inner message from unauthorized examination or 
modification by securing the MH-T-CONTENT attribute of the 
outer message.
MH-CTO-P772 Content encodes an IPM or IPN according to the P772 Military 
Messaging System protocol rules of the document ACP 123, 
which include the BER.
MH-CTO-UNI-
DENTIFIED
Syntax and semantics of the content are unidentified. This value 
is used by mutual agreement of the originator and recipients. 
The ASN.1 object identifier is specified by an object ID string 
(the DDL-constant value “\x56\x03\x03\x00”).










