How Tagging Solves the Problem of the Physical World
One of the unavoidable buzzwords of Web 2.0 is the term “tag”. Everywhere you look online you come across the term, and everything from photos to news articles to blogposts are getting “tagged”. But what exactly are “tags” and why are they such a big deal these days? To understand the importance of tagging, first let’s consider the problem that tagging sets out to solve. There was a time when everything in our lives existed only in the physical world. Books sat on shelves. Photos were in photo albums. Music was stored on CDs. Life was simple. If you wanted to find that photo of your sister-in-law Wendy wearing a silly hat at last year’s family Christmas party you simply went to the family photo album and flicked through the pages till you found it. The photo was a real physical object that existed in one real physical location. Storing a photo in a family photo album seems pretty obvious, but the problem is that this method of storing, finding and accessing an object does not scale...