James;

How do you generate the header to ensure uniquess? I am curious because I have an application that has users in the field (no possible way to access the network) for up to 2 weeks at a time and I may want to consider your idea for some of our tables.

I forgot to respond this to your prvevious post: a surrogate integer keys is faster than a surrogate GUID but it is slower than a natural key when it requires an additional join... Don't get me wrong, I almsot always use surrogate keys for the main table but I will use a natural key for secondary tables when it makes sense.

Daniel