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ＳＤＰ（Ｓｏｕｒｃｅ Ｄａｔａ Ｐｒｏｃｅｓｓｏｒ）是上海市长途电信局“长途电信营业帐务系统”（ Ｔｅｌｅｃｏｍ ｍ ｕｎｉｃａｔｉｏｎｓＢｉｌｌｉｎｇ Ｓｙｓｔｅｍ ，ＴＢＳ）中的原始数据处理子系统。ＴＢＳ是一个集原始数据处理、客户管理、帐务处理于一体的大型数据处理系统，在ＶＡＸ／ＶＭＳ操作系统下用ＰＡＳＣＡＬ语言实现。本文将介绍ＳＤＰ的软件结构设计及数据结构设计，并详细讨论几种对ＳＤＰ的时间和空间效率至关重要的算法和数据结构
The SDP (Source Data Processor) is the original data processing subsystem in Shanghai Telecom’s telecommunications billing system (TBS). TBS is a large data processing system integrating raw data processing, customer management and account processing. It is implemented in the PASCAL language under the VAX / VMS operating system. This article introduces the SDP software architecture design and data structure design and discusses in detail several algorithms and data structures that are crucial to the SDP’s time and space efficiency