z/OS MVS Installation Exits
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DD String Prefix

z/OS MVS Installation Exits
SA23-1381-00

String Length
Two-byte length of the entire text string
Statement Type
One-byte indicator of the type of text string
DD indicators
One byte of DD-related information indicators
DD Verb Key
Verb key for the DD text string (X'6E')
  • The DD indicator field contains one byte of DD-related information.
    X'01'
    DUMMY specified
    X'02'
    DDNAME= specified
    X'04'
    DSNAME specified in quotation marks
    X'08'
    DYNAM specified
    X'10'
    SYSIN (DD * or DD DATA) data set
    X'20'
    SYSOUT data set
    X'40'
    SUBSYS= specified
    X'80'
    Statement is from a procedure
  • The verb key for the DD text string is always X'6E'.
Parent topic: Prefix Format

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