That's correct. I'm follow this topic since about 10 years now. It seems to be an important issues. But super hard problem. I could not find any close to relat

That's correct. I'm follow this topic since about 10 years now. It seems to be an important issues. But super hard problem. I could not find any close to relatable solution. Building a company that does only exactly one things, offer an API that takes a receipt as input and returns key/value, is enough.