7.7 Multi-Level "Metabases" - Infinite Data at a Click ---------------------------------------------------------- POWERFUL FEATURE - BlueBook can run any DOS program from a record, INCLUDING ITSELF. This means it is possible to have nested databases of databases ("metabases"), arranged along the same lines as a PC's sub-directories. Databases are still separately accessible. A two-level metabase can contain (theoretically) over a billion records (32000 x 32000), each with two-click access to any amount of data. And there's no need to stop there.... ---------------------------------------------------------- To set up a metabase, just create a database and start adding records, one for each "dependent" database you wish to hang off it. For each record, click Exec/Edit, and enter BlueBook in the program line. In Parameters, enter the path and file name of the database you want opened when you "Run". Hit , then click Locate -- the full program details should be entered for you. If you now click Run/type R, the current database will be closed and the "lower level" one opened; and when you exit that, the opposite will happen. You will be returned to the database and record you left. Metabases can have as many levels as DOS resources permit. At 18k per "instance" (level) of BlueBook, that means DEEP. In practise, however, you won't need more than two levels, or possibly three, just like directories. ---------------------------------------------------------- TIP - You can also run BBZip.Bat instead of BlueBook, of course, so keeping databases in zip-compressed format. See below, section 7.8. ---------------------------------------------------------- ---------------------------------------------------------- VERY IMPORTANT: If you keeping databases on removable media, read the warning about "Run" and removable media in section 7.1 ---------------------------------------------------------- 7.8 File/Document Management, and Compression-in-place BlueBook is designed to work closely with PKZip/PKUnZip (the standard data compression format on PC's) to save your disk space. It can even provide a whole zipfile or document/data management system, in or out of Windows, and databases can themselves be stored zipped, for economy. If interested, see the file "Zipping.Doc".