As an interface standard, ISO 11073-90101:2008 specifies the common communication interfaces and protocols between systems and devices. It facilitates the transfer of data to support the creation of point-of-care applications, services and institutional policies. This International Standard does not directly address specific point-of-care application and service level functions, such as device lockout and operator list management. It specifies protocol, not policy. The interfaces specified support the communication required for engineers to build such application-level functionality. Specifying, building and providing the applications to support these services are left to customers, device and information system vendors.