Everyone talks about Metadata and privacy issues. There has been so much scary talk about metadata, that Knut A. Technogeek woke up in a cold sweat from a terrible nightmare: NSA agents had thrown him into a pit of cyberspace, and he fell and fell and fell, passing all these bits and bytes of information that he could not grab hold of. He realized that he needed to learn more about metadata, if he wanted to avoid a repeat visit of the nightmare. 
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