ISO/IEC 19784-2:20 07定义了BioAPI的生物识别服务提供商（BSP）和生物识别存档功能提供商（BAFP）之间的接口。BAFP封装了用于生物测定参考数据的存储、搜索和管理的所有功能，而与物理存储介质的类型无关。使用BAFP，BSP不必提供对不同存储介质（如数据库服务器、智能卡、数据库web服务等）的特殊处理。无论使用何种介质，BSP在所有情况下都为BAFP处理相同的接口。界面描述包含附加和分离不同BAFP、查询生物特征数据记录和存储生物特征数据记录的管理功能。

ISO/IEC 19784-2:2007 defines the interface between a biometric service provider (BSP) and a biometric archive function provider (BAFP) for BioAPI. A BAFP encapsulates all functionality for the storage, search and management of biometric reference data regardless of the kind of physical storage media. Using a BAFP, a BSP does not have to provide special handling of different storage media like database servers, smartcards, database web services, etc. Whatever media is used, the BSP in all cases handles the same interface for a BAFP.

The interface description contains management functions to attach and detach different BAFPs, to query biometric data records and to store biometric data records.