THE COMMON COMMAND LANGUAGE - AN IMPLEMENTATION FOR FACTUAL DATA BANKS
The Common Command Language is a standard supported by the Commission of the European Communities for an interrogation Language for data banks connected to EURONET. It is primarily designed for retrieval of data from bibliographic data banks. Experimental work has been carried out in order to develop and implement a CCL compatible interrogation language for ADABAS based on factual data banks. From spring 1984 onwards, work has been done to extend this experimental CCL to an operational language, intended as a tool for access to the ECDIN data bank operated by the Commissions JRC. The paper presents general problems, concerning the transfer of a language designed for an apparent flat file system to a multifile system with complex links between the various data items. The logical structure of the complex data bank must be kept transparent without losing the advantages of a complex structure. Retrieval and display of formatted data give rise to complications not encountered with free text data. The paper discusses certain approaches to solve the formatting problems with the CCL syntax. The discussion is illustrated with examples from the ECDIN data bank.
Bibliographic Reference: INTERNATIONAL ONLINE INFORMATION MEETING, LONDON (UK), DEC. 4-6, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31780 ORA
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Record Number: 1989123104400 / Last updated on: 1987-01-01
Available languages: en