three column dataset - additions and deletions

[MRAB]

On 03/12/2010 01:42, Tim Harig wrote:
> On 2010-12-03, draeath<draeath.spamtrap at gmail.com>  wrote:
>> On Thu, 02 Dec 2010 22:55:53 +0000, Tim Harig wrote:
>>
>> Thanks for taking the time to check in on this, Tim!
>>
>>> So, basically, you want to store a local copy of the data and sync it to
>>> the original.
>> In a way. I only need to store one copy of the data, and make note of
>> changes between it and the current data.
>
> Perhaps I am missing a sublty that makes those statements different.
>
[snip]
I take the difference to be this:

The first statement says there are 2 copies, the local one and the
original one, with the local one kept in synch with the original one.

The second statement says there's 1 copy, plus the changes which have
been made to it.