/sys$common/syshlp/NCLHELP.HLB  —  set  session_control, application  data abstraction (Tru64 UNIX)
    Default: Message       Value: Message or stream

    Type of data transfer interface the application will be using;
    message type or stream type. The message data abstraction is
    identical to the Sequenced-packet socket concept of the Phase IV
    session control. When writing applications, you should use the
    same data abstraction as that used by the program to which you
    connect.

    Table Data Abstraction Type Comparison compares Message and
    Stream data abstractions.

    Table 1-1 Data Abstraction Type Comparison

    Message Type           Stream Type

    Preserves message      Does not preserve message boundaries
    boundaries

    HP DECnet-Plus         Commonly used for Tru64 UNIX
    for OpenVMS default    applications
    abstraction

    Not available on       Available on TCP/IP
    TCP/IP

    Supported by XTI       Supported by XTI
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