Structured document formats like DITA, DocBook, and Solbook are characterized by deeply nested tags and a multitude of schema constraints. Unstructured tagging languages like HTML, on the other hand, are wide open. In one meeting, every reason we came up with that made them seem necessary, was answered by a convincing counter argument. "Reuse" would seem to be the most important reason. And maybe there are some compelling cases. But maybe all-out reuse isn't needed. Maybe we really only need a very restricted form that solves those cases.