Ben, thanks in advance for your help.
The question I have is related to database part of the project.
Do you have to keep text data file* in synch with binary
( binary + metadata ) file**?
*text data file - example of this file is provided by SUN
**binary file - file created by "Data conversion utility"
So, after makeing updates to binary file do you have to make sure that flat text data file is in synch with changed binary or we forget about text file right after running "Data conversion utility" and generating binary database.