z/OS MVS JCL Reference
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Parameter field

z/OS MVS JCL Reference
SA23-1385-00

A DD statement has two kinds of parameters: positional and keyword. All parameters are optional.

Leave the parameter field blank only in the following cases:
  • When SMS will provide the necessary DD description.
  • When leaving a DD statement within a concatenation unchanged and overriding parameters on subsequent DD statements within that concatenation.

Positional parameters: A DD statement can contain one positional parameter. If coded, this positional parameter must precede all keyword parameters.

Table 1. Positional parameters
POSITIONAL PARAMETERS VALUES PURPOSE
[ * ]
[DATA]

See section * Parameter or DATA parameter

*: for data sets containing no JCL DATA: for data sets containing JCL In a non-APPC scheduling environment, begins an in-stream data set.
DUMMY

See section DUMMY parameter

  Specifies no space allocation, no disposition processing, and, for BSAM and QSAM, no I/O.
DYNAM

See section DYNAM parameter

  (Parameter is supported to provide compatibility with previous systems.)

Keyword parameters: A DD statement can contain the following keyword parameters. You can code any of the keyword parameters in any order in the parameter field after a positional parameter, if coded.

Do not use DD statement keywords as symbolic parameters in procedures to be started by a START command from the operator console.

Table 2. Keyword parameters
KEYWORD PARAMETERS VALUES PURPOSE
ACCODE=access-code

See section ACCODE parameter

For ISO/ANSI/FIPS Version 3 tapes, access-code: 1 - 8 characters, first must be upper case A - Z.

For ISO/ANSI Version 4 tapes, access-code: 1 - 8 characters, first must be upper case A - Z, number 0 - 9, or one of these special characters: ! * " % & ' ( ) + , - . / : ; < = > ? _

Specifies or changes an accessibility code for an ISO/ANSI/FIPS Version 3 or ISO/ANSI Version 4 tape output data set.
AMP=(subparameter)
AMP=('subparameter[,subparameter]...')

subparameters:

     AMORG
     BUFND=number
     BUFNI=number
     BUFSP=bytes
     CROPS=  {RCK}
             {NCK}
             {NRE}
             {NRC}

     FRLOG=  {NONE}
             {REDO}

     OPTCD=  {I }
             {L }
             {IL}

     RECFM=  {F }
             {FB}
             {V }
             {VB}

     STRNO=number
     SYNAD=modulename
     TRACE
      ACCBIAS=[USER  ]
              [SYSTEM]
              [DO    ]
              [DW    ]
              [SO    ]
              [SW    ]

      SMBDFR= {Y | N}

      SMBHWT= nn

      SMBVSP= {nnK | nnM}

      MSG=SMBBIAS
      RMODE31=[ALL ]
              [BUFF]
              [CB  ]
              [None]

See section AMP parameter

see z/OS DFSMS Using Data Sets Completes information in an access method control block (ACB) for a VSAM data set.
With SMS only:
AVGREC=  {U}
         {K}
         {M}

See section AVGREC parameter

U: space specified in records
K: space specified in thousands
    of records
M: space specified in millions
    of records

Specifies a record request and the quantity of primary and secondary space specified on the SPACE parameter.
BLKSIZE= {value}
         {valueK}
         {valueM}
         {valueG}

See section BLKSIZE parameter

value: the specified maximum length, in bytes, of a block (The maximum is depending on the device type.)

valueK: the specified maximum length, in kilobytes, of a block (The maximum is 2097152K.)

valueM: the specified maximum length, in megabytes, of a block (The maximum is 2048M.)

valueG: the specified maximum length, in gigabytes, of a block (The maximum is 2G.)

Specifies the maximum length of a block.
BLKSZLIM= {value}
          {valueK}
          {valueM}
          {valueG}

See section BLKSZLIM parameter

value: 32,760 bytes - 2,147,483,648 bytes (two gigabytes)

valueK: 32K - 2,097,152K (two gigabytes)

valueM: 1M - 2048M (two gigabytes)

valueG: 1G - 2G (two gigabytes)

Specifies an upper limit on a data set's block size if BLKSIZE is omitted from all sources and the system determines the block size for the data set.
BURST= {YES}
       {Y  }
       {NO }
       {N  }

See section BURST parameter

YES or Y: burster-trimmer-stacker
NO or N: continuous forms stacker

Directs output to a stacker on a continuous-forms AFP printer.
CCSID=nnnnn

See section CCSID parameter

nnnnn: 1 - 65535 Specifies the coded character set identifier indicating the character code conversion performed on reads from and writes to tapes accessed in ISO/ANSI Version 4 format.
CHARS=  {table-name                  }
        {(table-name[,table-name]...)}
        {DUMP                        }
        {(DUMP[,table-name]...)      }

See section CHARS parameter

1 - 4 table-name subparameters:
  1 - 4 alphanumeric or $, #, @
  characters

DUMP: 204-character print lines
   on 3800 model 1

Names coded fonts for printing on an AFP printer. Requests a high-density dump on a SYSABEND or SYSUDUMP DD statement.
CHKPT=EOV

See section CHKPT parameter

  Requests a checkpoint at each end-of-volume except the last.
CNTL=  {*.label                      }
       {*.stepname.label             }
       {*.stepname.procstepname.label}

See section CNTL parameter

label: names CNTL statement
stepname: CNTL in named step
procstepname: step in named
  procedure

Causes the system to execute statements following an earlier CNTL statement.
COPIES= {nnn                            }
        {(nnn,(group-value[,group-value]...))}
        {(,(group-value[,group-value]...))  }

See section COPIES parameter

nnn (JES2): 1 - 255
nnn (JES3): 0 - 255
1 - 8 group-values (JES2): 1 - 255
1 - 8 group values (JES3): 1 - 254

Specifies number of copies printed. For an AFP printer, can instead specify number of copies of each page printed before the next page is printed.
With SMS only:
DATACLAS=data-class-name
See section DATACLAS parameter
data-class-name: installation-defined name of a data class Specifies the data class for a new data set.
DCB=(subparameter[,subparameter]...)


DCB= ( {dsname                        } )
     ( {*.ddname                      } )
     ( {*.stepname.ddname             } )
     ( {*.stepname.procstepname.ddname} )
     (  [,subparameter]...              )

See section DCB parameter

subparameter: see tables in DCB parameter description

*.ddname: copy DCB parameter from named cataloged data set

dsname: copy DCB information from named earlier DD statement

stepname: DD in named step

procstepname: step in named procedure

Completes information in data control block (DCB).
DDNAME=ddname

See section DDNAME parameter

ddname: names later DD statement Postpones defining the data set until later in same step: on a DD statement in the calling step or in a procedure called by the step.
DEST=destination

     destination (JES2):
          LOCAL
          name
          Nnnnnn
          NnRmmmmm to NnnnnnRm
          (node,remote)
          Rnnnnn or RMnnnnn or RMTnnnnn
          Unnnnn
          (node,userid)

     destination (JES3):
          ANYLOCAL
          device-name
          device-number
          group-name
          nodename
          (node,userid)

See section DEST parameter

LOCAL or ANYLOCAL: local device

name: named local or remote device

Nnnnnn: node (1 - 32,767)

NnRmm: node (1 - 32,767) and remote work station (1 - 32,767); 6 digits maximum for n and m combined

Rnnnnn or RMnnnnn or RMTnnnnn: remote terminal (1 - 32,767)

Unnnnn: local terminal (1 - 32,767)

(node,userid): node (1 - 8 alphanumeric or $, #, @ characters) and TSO/E userid (1 - 7 alphanumeric or $, #, @ characters) or VM userid (1 - 8 alphanumeric or $, #, @ characters)

device-number: 3-digit or 4-digit hexadecimal number (/ required before 4-digit number)

device-name: local device (1 - 8 alphanumeric or $, #, @ characters)

group-name: 1 or more local devices or remote stations (1 - 8 alphanumeric or $, #, @ characters)

nodename: node (1 - 8 alpha- numeric or $, #, @ characters)

Sends a sysout data set to the specified destination.
DISP=[status]
DISP=([status][,normal-termination-disp]
              [,abnormal-termination-disp])

See section DISP parameter

status: NEW, OLD, SHR (for shared), MOD (for data set to be modified)

normal-termination-disp: DELETE, KEEP, PASS, CATLG, or UNCATLG

abnormal-termination-disp: DELETE, KEEP, CATLG, or UNCATLG

Describes the status of the data set and tells the system to do the following with the data set after normal or abnormal termination of the step or job: delete or keep it on its volume(s), pass it to a later step, or add it to or remove it from the catalog.
DLM=delimiter

See section DLM parameter

delimiter: 2 characters In a non-APPC scheduling environment, terminates an in-stream data set.
DSID= {id      }
      {(id,[V])}

See section DSID Parameter

id: 1 - 8 characters
V: label was verified (only on a
   SYSIN DD statement)

Identifies a data set on a diskette of a 3540 Diskette Input/Output Unit.
{DSNAME} = {dsname                        }
{DSN   }   {dsname(member-name)           }
           {dsname(generation-number)     }
           {&&dsname(member-name)         }
           {*.ddname                      }
           {*.stepname.ddname             }
           {*.stepname.procstepname.ddname}
           {NULLFILE                      }

See section DSNAME parameter

unqualified dsname: 1 - 8 alphanumeric or $, #, @ characters, -, +0

qualified dsname: multiple names joined by periods

member-name: member in PDS or PDSE

generation-number: 0 or signed integer

stepname: DD in named step

procstepname: step in named procedure

NULLFILE: dummy data set

Names the data set.
DSNTYPE= {BASIC}
         {LARGE}
         {EXTREQ}
         {EXTPREF}
         {LIBRARY}
         Start of change {(LIBRARY,1)}
         {(LIBRARY,2)} End of change
         {HFS    }
         {PDS    }
         {PIPE   }

See section DSNTYPE parameter

BASIC: basic format data set
LARGE: large format data set
EXTREQ: extended format data set
EXTPREF: extended format data set
    (preferred)

LIBRARY: partitioned data
   set extended (PDSE),Start of change with
   optional version number End of change

HFS: hierarchical file system
   (HFS) data set
PDS: partitioned data set
PIPE: FIFO special file

Specifies the type of data set.
EATTR=[OPT|NO]

See section EATTR parameter

OPT: Extended attributes are optional

NO: No extended attributes

Indicate whether the data set can support extended attributes (format 8 and 9 DSCBs) or not.
EXPDT=  {yyddd   }
        {yyyy/ddd}

See section EXPDT parameter

yyddd: expiration date (yy: 2-digit year, ddd: day 001-366)

yyyy/ddd: expiration date (yyyy: 4-digit year, ddd: day 001-366)

Specifies an expiration date for the data set.
FCB=  {fcb-name                }
      {(fcb-name [,ALIGN  ]  ) }
                 [,VERIFY ]

See section FCB parameter

fcb-name: 1 - 4 alphanumeric or
   $, #, @ characters
ALIGN: operator check forms
   alignment
VERIFY: operator verify FCB image

Specifies FCB image, carriage control tape for 1403 Printer, or data-protection image for 3525 Card Punch.
FILEDATA= {BINARY}
          {TEXT  }
          {RECORD}

See section FILEDATA parameter

BINARY: byte-stream file
TEXT: delimited by the
      EBCDIC newline character
RECORD: the data consist of records
          with prefixes.

Specifies the content type of a z/OS® UNIX file.
FLASH=  {overlay-name          }
        {(overlay-name[,count])}
        {NONE                  }

See section FLASH parameter

overlay-name: forms overlay frame
   (1 - 4 alphanumeric or $, #,
   @ characters)
count: copies with overlay (0 - 255)
NONE: suppresses flashing

For printing on a 3800 Printing Subsystem, indicates that the data set is to be printed with the named forms overlay and can specify how many copies are to be flashed.
FREE= {END  }
      {CLOSE}

See section FREE parameter

END: unallocate at end of last step CLOSE: unallocate when data set is closed Specifies when to unallocate the resources for this data set.
HOLD=  {YES}
       {Y  }
       {NO }
       {N  }

See section HOLD parameter

YES or Y: holds this sysout data set

NO or N: allows normal processing for this sysout data set’s output class

Tells the system to hold this sysout data set until released by the operator.
KEYLEN=bytes

See section KEYLEN parameter

bytes: number of bytes (1-255 for key-sequenced (KS), 0-255 for sequential (PS) or partitioned (PO)) Specifies the length of the keys in the data set.
With SMS only:
KEYOFF=offset-to-key

See section KEYOFF parameter

offset-to-key: position of key (0 to difference of LRECL and KEYLEN minus 1) Specifies the offset of the first byte of the record key.
LABEL= ([data-set-seq-no][,label-type] [,PASSWORD]) [,IN ] [,RETPD=nnnn       ])
                                       [,NOPWREAD]) [,OUT] [,EXPDT= {yyddd   }]
                                       [,        ]) [,   ] [        {yyyy/ddd}]
 

See section LABEL parameter

  data-set-seq-no: data set position on tape volume (1 - 4 decimal digits)

label-type: SL: IBM® standard labels SUL: IBM standard and user labels AL: ISO/ANSI Version 1 and ISO/ANSI/FIPS Version 3 labels AUL: user labels and ISO/ANSI Version 1 and ISO/ANSI/FIPS Version 3 labels NSL: nonstandard labels NL: no labels BLP: bypass label processing LTM: leading tapemark

PASSWORD: password required to access data set

NOPWREAD: password required to change or delete data set

IN: only read BSAM data set opened for INOUT or BDAM data set opened for UPDAT

OUT: only write to BSAM data set opened for OUTIN or OUTINX

RETPD=nnnn: retention period (nnnn: 1 - 4 decimal digits)

EXPDT=yyddd: expiration date (yy: 2-digit year, ddd: day 001 - 366)

EXPDT=yyyy/ddd: expiration date (yyyy: 4-digit year, ddd: day 001 - 366)

Specifies information about a data set’s label, password, opening, expiration date, and, for a tape data set, relative position on the volume.
LGSTREAM=name
 

See section LGSTREAM parameter

name: the name of the prefix that the system logger uses for the forward recovery log stream Specifies the prefix of the name of the log stream for an SMS-managed VSAM data set.
With SMS only:
LIKE=data-set-name

See section LIKE parameter

data-set-name: dsname of model data set Specifies the attributes of a new data set.
LRECL=(bytes)

See section LRECL parameter

bytes: length in bytes (1-32,760 for PS or PO, 1-32,761 for KS, ES, or RR) Specifies the length of the records in the data set.
Start of change
MAXGENS=maximum-generations

See section MAXGENS parameter

End of change
Start of change maximum-generations: 0 - 2000000000 End of change Start of change Specifies the maximum number of generations for members in a Version 2 PDSE. Requires APAR OA42358. End of change
With SMS only:
MGMTCLAS=data-class-name

See section MGMTCLAS parameter

data-class-name: installation- defined name of a data class Specifies the management class for a new data set.
MODIFY= {module-name        }
        {(module-name[,trc])}

See section MODIFY parameter

module-name: 1 - 4 alphanumeric or $, #, @ characters

trc: table-name in CHARS parameter (0 for first, 1 for second, 2 for third, and 3 for fourth table-name)

Specifies a copy-modification module in SYS1.IMAGELIB to be used by JES to print the data set on a 3800 Printing Subsystem.
OUTLIM=number

See section OUTLIM parameter

number: 1 - 16777215 logical records maximum Limits the logical records in this sysout data set.
OUTPUT=  {reference                 }
         {(reference[,reference]...)}
reference:
  • *.name
  • *.stepname.name
  • *.stepname.procstepname.name

See section OUTPUT parameter

name: names earlier OUTPUT JCL
   statement
stepname: OUTPUT JCL in named
   step
procstepname: step in named
  procedure

Associates this sysout data set with one or more OUTPUT JCL statements.
PATH=pathname

See section PATH parameter

pathname: pathname for a file

Specifies the name of a UNIX File.
PATHDISP=(normal-termination-disposition,
         abnormal-termination-disposition)

See section PATHDISP parameter

normal-termination-disposition:
   KEEP, DELETE
abnormal-termination-disposition:
   KEEP, DELETE

Tells the system to keep or delete the file after the job step ends.
PATHMODE=file-access-attribute
PATHMODE=(file-access-attribute
         [,file-access-attribute]...)

See section PATHMODE parameter

file-access-attribute for file owner class: SIRUSR, SIWUSR, SIXUSR, SIRWXU

file-access-attribute for file group class: SIRGRP, SIWGRP, SIXGRP, SIRWXG

file-access-attribute for file other class: SIROTH, SIWOTH, SIXOTH, SIRWXO

file-access-attribute to set process IDs: SISUID, SISGID

Specifies file access attributes when creating a UNIX File.
PATHOPTS=file-option
PATHOPTS=(file-option[,file-option]...)

See section PATHOPTS parameter

file-option for access group: ORDONLY, OWRONLY, ORDWR

file-option for status group: OAPPEND, OCREAT, OEXCL, ONOCTTY, ONONBLOCK, OSYNC, OTRUNC

Specifies access and status for a file.
PROTECT=YES

See section PROTECT parameter

  Requests that RACF® create a discrete profile to protect a data set on direct access or a tape volume.
Coding RECFM for BDAM Access Method:
RECFM=     {U  }
           {V  }
           {VS }
           {VBS}
           {F  }
           {FT }
 
Coding RECFM for BPAM Access Method:
RECFM=     {U   } [A]
           {UT  } [M]
           {V   }
           {VB  }
           {VS  }
           {VT  }
           {VBS }
           {VBT }
           {VBST}
           {F   }
           {FB  }
           {FT  }
           {FBT }
 
Coding RECFM for BSAM, EXCP, and QSAM Access Methods:
RECFM=      {U   } [A]
            {UT  } [M]
            {F   }
            {FB  }
            {FS  }
            {FT  }
            {FBS }
            {FBT }
            {V   }
            {VB  }
            {VS  }
            {VT  }
            {VBS }
            {VBT }
            {VBST}
 
For BSAM, EXCP, and QSAM using ISO/ANSI/FIPS data sets on tape:
RECFM=      {D  } [A]
            {DB }
            {DS }
            {DBS}
            {U  }
            {F  }
            {FB }
 

See section RECFM parameter

Record format is:
   F: fixed length
   B: blocked
   S: spanned
   V: variable length
   U: undefined length
   T:  track-overflow feature
   D:  variable-length ISO/ANSI tape
         records
Control characters are:
   A: ISO/ANSI code
   M: machine code

Specifies the format and characteristics of the records in a data set.
With SMS only:
RECORG= {KS}
        {ES}
        {RR}
        {LS}

See section RECORG parameter

Organization of records:
   KS: key-sequenced
   ES: entry-sequenced
   RR: relative record
   LS: linear space

Specifies the organization of the records in a VSAM data set.
With SMS only:
REFDD= {*.ddname                      }
       {*.stepname.ddname             }
       {*.stepname.procstepname.ddname}

See section REFDD parameter

Referenced DD statement:

ddname: unqualified name

stepname: qualified by step name

procstepname: step in procedure

Specifies the attributes of a new data set by referring to a previous DD statement.
RETPD=nnnn

See section RETPD parameter

nnnn: number of days (0-9999) Specifies the retention period for a new data set.
RLS= {NRI}
     {CR }
     {CRE }
      

See section RLS parameter

NRI: can read uncommitted changes CR: can read only committed changes CRE: ensures that records read by a unit of recovery are not changed by other units of recovery until the reading unit of recovery issues a syncpoint. Specifies the record-level sharing protocol to be used with a VSAM data set.
With SMS only:
SECMODEL=(profile-name[,GENERIC])

See section SECMODEL parameter

profile-name: name of model profile GENERIC: model is generic profile Specifies a RACF profile to be used for a new data set.
SEGMENT=page-count

See section SEGMENT parameter

page-count: number of pages of a sysout data set Specifies the number of pages produced for the current segment of the sysout data set before the data set is spun-off for output processing. (JES2 only)
For system assignment of space:
SPACE=({TRK,    } (primary-qty [,second-qty] [,directory]) [,RLSE] [,CONTIG] [,ROUND] )
       {CYL,    }              [,          ]               [,    ] [,MXIG  ]
       {blklgth,}                                                  [,ALX   ]
       {reclgth,}                                                  [,      ]
 
To request specific tracks:
SPACE= 
(ABSTR, (primary-qty,address [,directory]))
                                   
To request directory blocks (with SMS only):
SPACE=(,(,,directory))

See section SPACE parameter

  TRK: allocation in tracks

CYL: allocation in cylinders

blklgth: allocation in average blocks, 1 - 65535

reclgth: allocation in average records (SMS)

primary-qty: number of tracks, cylinders or blocks to be allocated

second-qty: additional tracks or cylinders to be allocated, if more are needed

directory: number of 256-byte records for PDS directory

RLSE: release unused space when data set is closed

CONTIG: contiguous primary allocation

MXIG: allocation in largest available space

ALX: allocation of up to 5 separate contiguous primary quantities

ROUND: allocation by block length rounded to integral cylinders

ABSTR: allocation at the specified address

address: track number of first track to be allocated

Requests space for a new data set on direct access storage.
SPIN=  {UNALLOC} (JES2 only)
       {NO     }

See section SPIN parameter

UNALLOC (JES2 only): the data set is available for printing immediately upon unallocation. UNALLOC is supported on JES2 only. NO: the data set is available for printing at the end of the job Specifies that the output for a sysout data set is available for printing immediately upon unallocation or at the end of the job.
With SMS only:
STORCLAS=storage-class-name

See section STORCLAS parameter

storage-class-name: installation- defined name of a storage class Specifies the storage class for a new data set.
SUBSYS= (subsystem-name           )
        ([,subsystem-parameter]...)

See section SUBSYS parameter

subsystem-name: identifies the
   subsystem
subsystem-parameter: specifies
   information for the subsystem

Requests a subsystem to process this data set.
SYSOUT=class
SYSOUT=([class] [,writer-name] [,form-name])
                [,INTRDR     ] [,code-name]
                [,           ]
SYSOUT=*
SYSOUT=(,)

See section SYSOUT parameter

class: A - Z, 0 - 9

writer-name: 1 - 8 alphanumeric or $, #, @ characters

form-name: 1 - 4 alphanumeric or $, #, @ characters

code-name: 1 - 4 alphanumeric or $, #, @ characters (JES2 only)

*: same output class as MSGCLASS parameter on JOB statement

Defines this data set as a sysout data set and (1) assigns it to an output class, (2) requests external writer to process it, (3) identifies print or punch forms, and (4) refers to the code-name of a JES2 /*OUTPUT statement.
TERM=TS

See section TERM parameter

  The TERM parameter has no function in an APPC scheduling environment. In a foreground job,indicates that this data set is coming from or going to a TSO/E userid. In a batch job, indicates that this DD statement begins an in-stream data set.
UCS= {character-set-code                    }
     {(character-set-code [,FOLD] [,VERIFY])}
     {                    [,    ]           }

See section UCS parameter

character-set-code: 1 - 4 alpha- numeric or $, #, @ characters

FOLD: operator load chain or train in fold mode

VERIFY: operator verify UCS image

Specifies universal character set, print train, or font for an AFP printer.
UNIT= ([ddd          ] [,unit-count][,DEFER])
       [/ddd         ] [,P         ]
       [/dddd        ] [,          ]
       [device-type  ]
       [group-name   ]

UNIT=AFF=ddname

See section UNIT parameter

device-number: 3-digit or 4-digit hexadecimal number (/ required before 4-digit number and optional before 3-digit number)

device-type: machine type and model

group-name: 1 - 8 alphanumeric or $, #, @ characters

unit-count: 1 - 59

P: allocate same number of devices as volumes for parallel mount

DEFER: defers mounting until open

SMSHONOR: indicates that the system should honor the device number or group-name for a SMS-managed tape library request

AFF=ddname: requests allocation of same devices as for DD statement ddname

Requests allocation to a specific device, a type or group of devices, or the same device(s) as another data set. Also can specify how many devices and deferred mounting.
{VOLUME}=([PRIVATE] [,RETAIN] [,volume-seq-no][,volume-count][,][SER=(serial-number[,serial-number]...)])
{VOL   }            [,      ] [,             ]                  [REF=dsname                            ]
                                                                [REF=*.ddname                          ]
                                                                [REF=*.stepname.ddname                 ]
                                                                [REF=*.stepname.procstepname.ddname    ]
                                                                [REF=*.procstepname.ddname             ]
 

See section VOLUME parameter

  PRIVATE: requests a private volume

RETAIN: requests private tape volume remain mounted and unwound or requests public tape volume be retained at device

volume-seq-no: begins processing with volume 1 - 255 of existing multivolume data set

volume-count: maximum volumes for output data set (1 - 255)

serial-number subparameters (1 - 255): volume serial numbers (1 - 6 alphanumeric, $, #, @, or special characters)

REF: copy volume serial numbers from another data set or earlier DD statement, or copy storage class for SMS-managed data sets

dsname: from cataloged or passed data set

ddname: from named earlier DD statement

stepname: DD in named step

procstepname: step in named procedure

Identifies the volume(s) on which a data set resides or will reside.

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