Regd. Difference check at the time of updation

[Pooja Verlani <po...@gmail.com>]

Hi all,

I am looking for a mechanism to check the amount
of difference between a document already in the index
with the one updated with some new content. Basically,
I want to design a criteria to decide whether or not to
update the document with the new one.
In case solr already has something like that present or if anyone
has an idea, please do share.

Thanks...
Regards,
Pooja