Thanks for your reply Mr. Erick All I want to do is that I have indexed some of my pdf files and doc files. Now, any changes I make to them, I want a delta-import(incremental) so that I do not have to re index whole document by full import . Only changes made to these documents should get updated. I am using "dataimporthandler". I have seen in forums but all of them have queried for delta import related to databases. I am just indexing some of my doc and pdf files for now. What should I do in order to achieve that? Thanks in advance
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