Sam wrote:
> I've used XML to read and locate elements.  Have solutions been 
> developed to police multiple clients updating an XML file without 
> overwriting each other?
Whatever script or language you are using, there should be a mechanism 
to lock a file. Lock a file before writing into it and unlock it when 
the write is finished. Check if a file is locked before opening it and 
wait until it is not locked anymore.
I hope that helps. But please keep in mind that this question does 
neither concern jQuery nor javascript in general. There should be lots 
of resources about transactions, concurreny and file locking elsewhere.

-- Jörn

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