How to keep trace of changes in SVG files?

[maria teresa <ma...@isti.cnr.it>]

Hello everybody,
I am new to Batik, so maybe I am asking something stupid, anyway I would 
appreciate if somebody could help me on this issue.
I have an svg image onto which many different users should be able to add 
their comments in the position they prefer by means of an icon that acts as 
a link to the comment. Each comment should be saved together with its 
writer's ID on a database, in order to be retrieved later by anyone among 
the users (any user should be able to read the comment that another user 
has written by clicking on his comment-icon link positioned somewhere).
At the moment, I am using JavaScript to let the users add their comments on 
the svg image, but I have no idea about how to preserve trace of the 
comments (when the document is reloaded all the links added are lost).

Any suggestions?
Thank you,
maria teresa


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