Prevent BoW from using document title for terms.

When I run my documents through BoW, it processes the titles.  As I am analyzing emails, this is rather inappropriate.

Is there a way to prevent this other than just assigning "title" to a meaningless column and filtering it with Regex later?

Words in the title are processed as well. This can not be avoided. You could use a string column containing e.g. numbers as title column for the Strings to document node and filter these numbers out later on with the number filter.