ISO/IEC 24727定义了一组用于集成电路卡和外部应用程序之间交互的编程接口，包括多部门使用的通用服务。 ISO/IEC 24727-4:2008标准化了客户端应用程序和卡应用程序之间的连接和安全机制。 它规定了独立于服务和独立于实现的ISO/IEC 24727兼容模块的API管理，包括安全性，该模块支持对集成电路卡的特定卡应用程序的操作请求，以便在与数据模型和内容发现操作耦合时，该卡应用程序可由各种客户端应用程序使用。

ISO/IEC 24727 defines a set of programming interfaces for interactions between integrated circuit cards and external applications to include generic services for multi-sector use. ISO/IEC 24727-4:2008 standardizes the connectivity and security mechanisms between the client-application and the card-application. It specifies API-Administration of service-independent and implementation-independent ISO/IEC 24727 compliant modules, including security, that enables action requests to a specific card-application of an integrated circuit card such that, when coupled to data model and content discovery operations, the card-application can be used by a variety of client-applications.