What actually i want is that when i am going to publish an item on my Joomla site then first of all a plug in must look for all previously posted items whether the newly coming item already exists or not (search and display any similar item)!! Just like when you are submitting a story to Digg, you are asked to confirm that it is not a duplicate of some similar stories already submitted. I have been searching through extensions.joomla.org for many days but have not found any. Thanks a lot in advance if someone can help me in this regard.