Courts regularly are asked to compel arbitration based on an agreement that is part of a multi-party transaction involving multiple documents. In some cases, the documents are understood to be part of a "unitary" contract when they cross-reference each other and adopt terms from the others. For example, a primary contractor may require that subcontractors adhere to the terms and conditions of the primary contract, or a "master agreement" for a franchiser or dealer may be followed by individual transactional purchase orders and confirmations "under" the terms of the master agreement. A new employee may sign a separate arbitration agreement as part of her application or the on-boarding process. Such documents carefully define the parties and their roles, so arbitration required in one often is understood as part of the "deal."