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L.C.S              organizing data in a computer system

Here is an example of subdivision of the set B of the logical bases relating to an industrial enterprise.

This is an example of course, but what is important to note is that each logical database  at level 3 will contain data on third parties, exchanges, and products exchanged similarly nature. (Be sure to number your bases !).
You will understand that this main objective is to make it easier for us to discover the last data containers included in each logical database, the "primary logical files" ,which become the elements of the definition in extension of the data set Of the system studied.

I would like to remind you that this document is not a course, I simply wish, through my speech, to give the reader an overview and some detail of JD's work. WARNIER concerning the organization of data in computer science.
For those who may be interested you can refer to the various books referring to it.


Another very important remark, We are in the absolute, we are building a computer system from scratch, we start from nothing, so do not try to use this approach on an existing system, it will not work ! And you will certainly be disappointed and discouraged. You can, however, re-examine your existing system, this is possible and perhaps strongly advised.

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