CCR provides the services C-BEGIN and C-PREPARE to mark the beginning and end of a sequence of steps to be treated as a single transaction. C-BEGIN includes the four primitives of a confirmed service; an application may elect to use either the confirmed or unconfirmed form. An application initiating a transaction (the client) follows C-BEGIN with a list of operations it wishes the responding application (the server) to perform. In some applications the end of the list may be clearly indicated; if not, the initiating application sends C-PREPARE to define the end of the transaction definition and to request the responder to indicate its ability to commit to completing the transaction.