Rational Developer for System z
Enterprise PL/I for z/OS, Version 4.1, Programming Guide

Defining stream files using PL/I dynamic allocation

To define the stream files, you can use a DD statement, an environment variable, or the TITLE option of the OPEN statement.

When an environment variable or the TITLE option is used, the name must be in uppercase. Specify the MVS data set in one of the following ways:

*DSN(data-set-name) 
*DSN(data-set-name(member-name))

data-set-name must be fully qualified and cannot be a temporary data set; for example, it must not start with &.

Specify the HFS file as follows:

PATH(absolute-path-name)

You can specify the following attributes in any order after the DSN keyword:

NEW, OLD, SHR, or MOD               
TRACKS or CYL                       
SPACE(n,m)                          
VOL(volser)                         
UNIT(type)                          
KEEP, DELETE, CATALOG, or UNCATALOG 
STORCLAS(storageclass)              
MGMTCLAS(managementclass)           
DATACLAS(dataclass)                 
Note:
You cannot create a PDS or PDSE using an environment variable or the TITLE option of the OPEN statement, but you can create a new member in an existing PDS or PDSE.

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