ReadWriteWeb

Let's suppose you uploaded some pictures of a trip to New York City to an online account. Do you tag them "New York City," "NYC," "newyork," or all of the above? How do you know your content will be correctly identified and related to other content on the web? And if you come across the tag "Tesla," how do you know whether it refers to the scientist, the car company, or the band?

Common Tag is a new tagging format that creates references to concretely defined concepts with their own metadata and URLs. With Common Tag, site owners can simply topic hubs, cross-promote content, and enrich pages with data, images, and widgets.