Document Visual Question Answering Annotation

Create reviewed document examples that connect a question and answer to visible source evidence. Use document regions, selectable text and configured properties to prepare DocVQA training data.
Document question-answering collage with a highlighted invoice total and matching Question and Answer properties.

Ground Every Answer in the Document

Build question-answer examples from invoices, records and forms while preserving the evidence a reviewer needs to verify each answer.
An invoice total region has Question and Answer text properties on its evidence annotation.

Answer Evidence Regions

Mark the document region that contains an answer, such as an invoice total. Store the question and answer as configured text properties on the evidence annotation.
A selectable PDF date span provides the answer to a shipment-date question.

Selectable Text Answers

Select an answer span when the PDF contains a usable text layer. Preserve the exact value and surrounding document context while annotating the question-answer example.
The checked Collection option is marked as evidence for a document question.

Form and Layout Evidence

Annotate the visible form field or selected option that supports an answer. Keep the question specific to what can be established from the document’s text and layout.
A reviewer checks the exact invoice total against its Question, Answer and Evidence annotation.

Question-Answer Review

Check the question, answer value and source evidence together. Return mismatched values or unsupported answer regions for correction before accepting the example.

Why AI Teams Choose Unitlab

Keep source data, annotation rules and review decisions connected as your team prepares document visual question answering.
15X
Faster Data Annotation
60%
Free Up AI Engineers’ Time
5X
Lower AI Development Costs

Annotation Types for Document Questions

Combine explicit question-answer properties with evidence anchored to the source document.
An invoice total region has Question and Answer text properties on its evidence annotation.

Evidence Regions with Text Properties

A document region identifies the supporting evidence. Configured Question and Answer text properties record the prompt and its reviewed response on the same annotation.

Document Text Spans

Selectable PDF text can be labeled as an answer span. This keeps the extracted value tied to the exact source text rather than a detached transcription.

A selectable PDF date span provides the answer to a shipment-date question.

Document Visual Question Answering FAQs

What is Document Visual Question Answering?

DocVQA is a document understanding task in which a model answers a question about a document image. Annotation prepares questions, answer values and supporting source evidence for training or evaluation.

How are questions and answers represented in Unitlab?

Configure text properties such as Question and Answer on an evidence annotation. Annotators mark the source region or supported text span and enter the values required by the project schema.

Can answers be selected directly from PDFs?

Yes, when the PDF contains a usable text layer, supported text selection can anchor an answer to the document. For scanned pages without selectable text, use visual evidence regions and configured answer text.

What types of documents suit this workflow?

Examples include invoices, receipts, forms and business records with questions answerable from their content. Define the document scope and question rules before annotation so the evidence requirements stay consistent.

How should questions be written?

Write questions whose answers are supported by the supplied document. For extractive examples, identify the exact answer value and annotate the evidence that distinguishes it from nearby fields.

Can form fields and selected options provide evidence?

Yes. A visual region can capture a form field or selected option, with question and answer properties describing the example. Reviewers should check both the text and visible selection state.

Does Unitlab generate the answers automatically?

The workflow described here records supplied or human-authored questions and reviewed answers. It does not assume automatic question generation, document reasoning or answer extraction.

How do reviewers find unsupported answers?

Reviewers compare the answer property with the annotated source region or text span and the question. Incorrect values, ambiguous questions or missing evidence can return for rework.

How can document examples be kept consistent?

Use shared annotation classes, required properties and clear question-writing guidelines. Review representative examples and apply the same evidence rules across document layouts.