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- 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.
-