Development of Network-Oriented High Performance Workstation

国家科学信息系统中心（NACSIS）的主要任务之一是编制大学图书馆图书和期刊的联合目录数据库。现在提供了基于X.25的全国网络，用于连接图书馆和NACSIS。编目员通过该网络访问NACSIS数据库，并以交互方式将数据输入数据库。因此，必须提供屏幕数据传输和数据下载的设施以及面向屏幕的用户友好界面。图书馆网络软件最初是在大型计算机上实现的。然而，图书馆网络的迅速扩展是不可预期的，因为小型图书馆很难引进大型机。此外，大型机上没有方便用户的界面。因此，实现一个既有网络设备，又有良好用户界面的小型编目工作站是一个迫切需要解决的问题。 ...更多信息 面向工作的工作站，适用于编目任务。首先，我们设计了网络协议规范，作为整个系统的基础。屏幕传输协议是主机与终端之间传输复杂数据库记录的应用层协议。该协议还包括数据库记录的下载功能，在实现友好的用户界面的同时，尽量减少网络软件的工作量。设计的VTSS协议是基于CCITT X.28标准的，通过PAD简化了与X.25网络的连接。上述协议的第一个原型软件在UNIX操作系统上实现。该协议规范的公开是为了方便计算机厂商在各种计算机系统上推广实施。目前有五家厂商提供VTSS协议软件供图书馆应用。并对这些系统进行了性能评估，对软件进行了改进，以提高响应时间。该项目的成果为日本图书馆网络的扩展和服务改进提供了基础。少

One of the major roles of the National Center for Science Information System (NACSIS) is to compile the union catalog database of books and serials held by university libraries. Nationwide network based on X.25 is now provided for the connection of libraries and NACSIS. Through this network, catalogers access NACSIS database and put data into the database interactively. Therefore it is necessary to provide the facilities for screen data transmission and down-loading of data as well as screen-oriented user-friendly interface.The software for library network was originally implemented on mainframe computers. However, the rapid expansion of library network could not be expected, since it was difficult for small libraries to introduce mainframes. moreover user-friendly interface was not available on mainframes. Thus, it was an urgent issur to implement small cataloging workstation which equips network facilities and good user interface as well.The aim of this project is to implement a netw … More ork oriented workstation applicable to catalogin tasks. First, we have designed network protocol specification as a basis of the whole system. The screen transfer protocol is the spplication level protocol for the transmission of complicated database record between host computer and terminals. Down-loading function of database record is also included in this protocol.We tried to reduce the workload of network software, as well as the implementation of user- friendly interface. The designed 'VTSS protocol' is based on CCITT X.28 for simplified connection to X.25 network through PAD. The first prototype software of the above mentioned protocol was implemented on UNIX operating system. The protocol specification was disclosed for the computer manufacturers to promote the implementation on various computer system. At present, five manufacturers provide VTSS protocol software for library application. The performance-evaluation was also done for these systems and the software was revised to improve response time.the fruits of this project is the basis of the expansion and service improvement of the library network in Japan. Less