Domain Knowledge Is the Product
The extraction engine is increasingly a commodity. What's left as the durable product is the domain knowledge encoded around it — and that's the part a generic competitor can't copy.
Domain-Knowledge
Not All Errors Cost the Same
Aggregate accuracy treats every field as equally important. The user doesn't. Where a tool spends its reliability should follow the cost of being wrong, not the count of fields.
The Extraction Boundary
There's a line between what a document processing system can extract and what requires domain reasoning. Getting that line wrong in either direction is expensive.
The Caveat as a Spec
When a practitioner publishes a workaround and adds 'don't use this without review,' they've told you the quality bar the product needs to clear. The caveat is a design constraint, not a disclaimer.
The Expert User
Building for professionals with deep domain expertise is often treated as a harder problem than building for general users. It's actually easier — in the ways that matter most.