MFX control statements are introduced by the invoking programs as character operands in DC operations. Although it is generally true that all control statements supported for a JCL-initiated Disk Sort/MAXSORT are available to invoked applications, these exceptions should be noted:
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A MODS control statement cannot be used for an E32 exit and is not required for an E15 or E35 exit. (An E32, E15 and/or E35 exit routine may be coded in line with the invoking program with their addresses passed to the sort in the parameter list. If a 31-bit or 64-bit parameter list is being used, an E18 and/or E39 exit routine address may also be passed.)
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A RECORD control statement is required if an inline E15 exit routine address is provided. Its LENGTH parameter is required whenever an inline E15 or E35 exit routine is used. For a full description of record length parameters, see RECORD Control Statement.
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The END control statement is not used.
The actual coding of the control statements is the same, except that:
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No comments or labels are permitted within the DC operand.
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Continuation characters are not called for, since the statements are not in card-image format.
For the 24-bit parameter list, each control statement DC instruction should be labeled and followed by a DC C' ' instruction so that the beginning and ending addresses of the control statement can be referenced in the parameter list.
Note that the 24-bit invoking parameter list and pointer word, as well as the control statement images, must be below the 16 megabyte line.
As in a JCL-initiated sort/merge, control statements must begin with at least one blank.
