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anybody with the similar problem..? is there anything specific we have to add in the CMS code to for prevention. we have used php with apache url rewriting.
most of the cms sites comes in google supplemental results
Do you mean your cms sites specifically, or are you suggesting pretty much everyone's cms sites are supplemental? If so, that's not the case.
Have you checked to see each page has a unique meta description tag?
i mean to say that i have checked most of the sites while searching for the CMS based websites, and found pages under supplemental including 2-3 CMS based sites of mine. I have blocked the unnecssary dynamic urls from robots file and each page is having unique content but still pages r supplemental in indexing. can we block the server to generating session id in php bcoz sometime we can see the url static & sometime with session id so that file goes under bad impression of the duplicate files due to 2 different names.