Title occurrence sets value
Specify Title occurrence sets value in the Options settings of a regular single item field if you want to set the field value to 0 or 1 depending on whether a certain text is on the invoice.
Interpret does not look for a value for the field. If Interpret finds the title text, it sets the field value to 1. Otherwise, Interpret sets the field value to 0.
The field always has format specification N(1).