Constrains responses to a schema.

Typed to the attribute — a boolean gets Yes/No, a number gets a number input with its unit, a list gets commas. Never a free-text box where the schema already knows the shape.

The server fetches this before storing anything. If it does not resolve, nothing is saved.

Shown on the product page in quotation marks, exactly as you paste it. This is what lets a reader judge the source instead of trusting us.

Shown next to the answer if you give one. Accounts are coming; a sourced answer is checkable either way.