When I add any field to a form, such as a text box, can I add a unique identifier that is independen t of page location? Or is any unique identifer assigned? And if so, how can I know what they are?
There is no such independent property that gets automatically assigned. You can use the combination of page number and rect, but that's not necessarily unique since you could have two fields with the same name at the same location. Do you need this in a scripting context or something else?
A Lesson in Templates for Adobe Acrobat by Dave Wraight