Istituto di Scienza e Tecnologie dell'Informazione     
Abba L., Cecaloni P., Romano G. A., Vannozzi D. Astra data base server: system specifications. Internal note CNUCE 224, 1990.
We describe a system intended to access databases distributed on EARN network. Thus system has been developed at CNUCE by the ASTRA project team. The service started, in test mode, january 1, 1989. The first version accessed the IBM study contracts database and other italian databases located on the EARN network. The databases were managed an IBM information retrieval system of IBM named STAIRS/CMS. Afterwards we deciced to interface some other I.R.S systems and a DataBase Management system based on the relational model. Today the system interface uses the same query language as the following host IRS or DBMS system: . STAIRS/CMS, produced and distributed by IBM . ISIS, produced and distributed by LAD at UNESCO Paris. . SQL/DS produced by IBM for the VM operating system. . SASjVM produced by SAS Institute for VM operating system. . FOCUS/VM produced by IBI Institute for VM operating system. The .SQL/DS relational DBMS, the SAS system and the FOCUS system are accessed via stored parametric quenes. The system is composed by several ASTRA Database Servers exchanging common requests and database requests of the users. The service is available to all networks which can communicate with EARN using RFC822 mail.
Subject Astra
H.3.5 Online Information Services
H.5.2 User Interfaces
H.2 Database Management

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