The text field may contain any of the escape sequences described in Escape Sequences. The text field is list aware. After escaping the field, it is decomposed into separate items delimited by newline (\n) or default list delimiter (\~) characters. Every item in the resolved list must be an absolute (/) or relative to the home folder (~/) file or folder path. Leading and trailing spaces are ignored in each list element.
If the text field resolves to be empty, all files active in the current execution context will be highlighted in a Finder window.
If the text field does not resolve to be empty, all specified files and/or folders will be highlighted in a Finder window.
The statement is valid while batch processing however it is a good idea not to open thousands of Finder windows.