Directory operations include storing new data in a directory, searching for and retrieving stored data, deleting unwanted data, updating obsolete data, and similar operations.

目录操作包括把新数据保存到目录，搜索和检索保存的数据，删除不需要的数据，更新过时数据，以及类似的操作。

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Service data Objects (SDOs) replace diverse data access models with a uniform abstraction for creating, retrieving, updating, and deleting business data used by service implementations.

服务对象数据(Service Data Object, SDO)使用统一的抽象代替了各种各样的数据访问模型来创建、检索、更新和删除供服务实现使用的业务数据。

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