It will be better if we get the table structure from hedex. Fro Hedex we cannot get the clear picture about which database tables for which activity. I hope Hedex admin will consider my suggesstion.

i also aggree, i also think HedEX should make clarity about document type and category , so that Engineer clearly know which category he should follow to get the related document as per his requiment. still we are in the search process...

very good wish...