虽然增加了开销，但目录辅助系统提供了一些在口头或简单的聚合环境中不易完成的高价值功能。
Despite the increased overhead, directory assistance systems provide a set of high-value functionality which is not easily accomplished within the confines of verbal or simple aggregate environments.
这些功能涉及用户、后端系统和数据库（产品目录）之间的直接交互。
These functions involve direct interaction between users, back-end systems, and databases (the catalog).
位于WebSphere Integration Reference Architecture的所有功能之下的是安全性、目录、系统管理和资源虚拟化的管理服务。
Beneath all the capabilities of the WebSphere Integration Reference Architecture are the management services for security, directory, system management, and resource virtualization.
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