Yahoo announces common tag

Yahoo have recently announced on their blog about the support of common tag, a new semantic tagging format for Web pages.

What is common tag?

Common Tag is an open tagging format developed to make content more connected, discoverable and engaging. Unlike free-text tags, Common Tags are references to unique, well-defined concepts, complete with metadata and their own URLs. With Common Tag, site owners can more easily create topic hubs, cross-promote their content, and enrich their pages with free data, images and widgets.

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