Thanks for the responses thus far. My inquiry is centered around tags and tagging blog posts (as opposed to the more classic meta tags) specifically - rather confusing terminology, my apologies.

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285 Columbus Lofts - New 63-unit Boston loft development in the former Red Cross building
FP3 Boston Condos - FP3 Fort Point Channel Boston Seaport Condos
Boston Real Estate - Providing Google Map based search of condo developments