Add some kind of markup around keys and values in the PDF. While it's important to know the desired field values, their position on the page could be necessary as well.
If you have access to a large number of vendors (invoice templates), these templates are going to be really valuable for creating better models. If you provide samples as a free/open dataset, you could make all invoice models that use your dataset, even if developed by other companies, better on your distribution.
If you have access to a large number of vendors (invoice templates), these templates are going to be really valuable for creating better models. If you provide samples as a free/open dataset, you could make all invoice models that use your dataset, even if developed by other companies, better on your distribution.