indicates one or more marked-up interventions in a document which have subsequently been marked for cancellation. points to one or more elements representing the interventions which are to be reverted or undone. This is just some sample text, we need not a real example.

This encoding represents the following sequence of events: "This is just some sample text, we need a real example" is written At stage s2, "just some sample text, we need" is deleted by overstriking, and "not" is added At stage s3, parts of the deletion are cancelled by underdotting, thus reinstating the words "just some" and "text".