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1987-03-02
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820b
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17 lines
Dir : db
The Data Base Management System
It is a very simple minded system. A data base is a file. The file has a
header with a magic number and the current number of entries. Follows a
fixed length sequential table of records. Each record is the transform's
identity and a pointer in bytes to its location in the file. When adding a
transform, the system first tries to fill the holes left by possibly
removed transforms. If none if found, the size of the file is increased.
Compacting is done separately.
The data base editor can dump the content of a file, selectively change
transforms, remove them, or create new ones. The active transform on which
modifications are made, can be renamed stored and read which allows for all
possible combinations.