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Tagging: People-powered Metadata for the Social Web by Gene Smith

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Chapter 3. Tagging System Architecture

<feature><title>What You’ll Learn in This Chapter</title> <objective>

The high-level choices you’ll make when architecting your tagging system

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The users-resources-tags model in detail

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Architecture of four popular tagging systems

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Five common problems and how to avoid them

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The simplicity and flexibility of tagging makes for some complex design decisions. The architecture of your tagging system—the rules that govern the interaction between users, resources, and tags—will have a profound impact on your system’s success.

Yahoo’s now-defunct Podcasts site provides a useful example. Yahoo Podcasts allowed you to tag podcasts—blog-like ...

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