While regular fields are used to extract dynamic data from incoming emails, PDF files, etc., constant fields allow you to set predefined (constant) values. This is helpful when you need to "tag" some documents or export a value that doesn't exist in documents.
A typical example: if your Parsio inbox receives emails from many sources which are processed by different templates, you may want to include the source name in the parsed data.
How to Add a Constant Field?
1. Open the template editor and navigate to the "Constants" tab.
2. Here you can either create a new constant field or add it from unused mailbox fields:
3. Then enter a name and a value to the newly added field:
4. Finally, save your template and parse an existing document: