I have a number of tables (tblArchive, tblContacts, tblEvents) which I term as content for my site. I need to categorise these and therefore have established a many to many relationship between these tables and the table tblCategory. So i have 3 many to many Tables (tblCategoryArchive, tblCategoryContacts, tblCategoryEvents). Is there any way I can have only one? In order to do this I would need to ensure that the primary keys in my Content tables are not duplicated (that when a new content record is created it increments taking into account the other tables). Would I use a Replication ID for this? If I do this are any constraints/drawbacks to consider?<BR><BR>Thanks in advance for any help/advice.