XML Topic Maps: Creating and Using Topic Maps for the Web

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All of the above tells what PSIs should be good for and what they surely won't achieve. But the central question has been kept for the end: How should an effective PSI be built?

We've explored fundamental external properties: stability and validation by an authoritative expert, leading to trust. We've seen that building trust is a bootstrapping process. To start this process, we need some content and some authoritative expertise. Let's take another example of that: a good PSI for topic maps is at http://www.topicmaps.org. Why is it a good one? It's stable, and users find there a clear definition of topic maps, a discussion of their history, the vocabulary of topic maps, the XTM 1.0 specification, and validation ...