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Specifies options with a subcommand file.

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The format of the subcommand file is as follows:
<option> { = | Δ } [<suboption> [,…] ] [ Δ&] [;<comment>]

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The option and suboption are separated by an "=" sign or a space.

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For the input option, suboptions are separated by a space.

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One option is specified per line in the subcommand file.

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If a subcommand description exceeds one line, the description can be allowed to overflow to the next line by using an ampersand (&).

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The subcommand option cannot be specified in the subcommand file.

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Command line specification:

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Subcommand specification:

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Option contents specified with a subcommand file are expanded to the location at which the subcommand is specified on the command line and are executed.

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The order of file input is file1.obj, file2.obj, file3.obj, and file4.obj.