++ Thanks for the information.

The process flow, about which I was unclear, could have been one of the following (non-exhaustive list):

• Database is updated; new data is propagated to all webpages.
• One webpage user is designated as "master"; changes made by this user are propagated to any other webpages.
• All webpages have equal standing; changes in any of these are propagated to all other webpages.