OUTFILE subcommand (BEGIN EXPR-END EXPR command)

The OUTFILE subcommand of BEGIN EXPR saves an XML-format file that specifies the expressions.

PREPXML
Specifies the XML-format file. Enclose file specifications in quotation marks and specify full file names. BEGIN EXPR does not supply file extensions. If the file specification refers to an existing file, then the file is overwritten.
Note: The optional combination of an asterisk (*) and a backslash (\) preceding the XML file name specifies that the file is a temporary file--for example, PREPXML='*\myexpressions.xml'.