Using elementary properties of interactional resources, we can capture commonalities and differences between repair formats in principled and precise ways. For instance, to capture the distinctions between four repair initiation formats in English (as presented in Sidnell 2010), we can use the following three properties: Question (is there a content question word?), Repetition (does the repair initiator repeat some material from the prior turn?) and Confirmation (does the repair initiator make confirmation relevant in next turn?).