INCLUDE statements can reference both MVS™ data sets and z/OS UNIX files to be used as input to the binder. z/OS UNIX files can be specified directly on an INCLUDE statement, or indirectly through DD statements that in turn reference z/OS UNIX files:

//LOADMOD    DD     DSNAME=PROJECT.LOADLIB,DISP=SHR
//OBJECT2    DD     PATH='/sl/app1/pm3d3/dlla02',PATHDISP=(KEEP,KEEP)
//SYSLIN     DD     *
  INCLUDE LOADMOD(TESTMOD,READMOD)
  INCLUDE '/ml/app1/pm3d3/dlla01'
  INCLUDE OBJECT2
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/*