Have you read or seen much on the next evolution of the Web called Web 2.0? Web 2.0 is a collection of technologies and frameworks that enables collaboration from a social perspective. We can see this transformation from Web 1.0 to the more collaborative Web 2.0 all around us. The success of Wikipedia, Folksonomies, RSS and Weblogs are undeniably changing every aspect of our lives. The Internet and associated technologies are constantly evolving. Within the world of metadata, we have seen three such transformations. After studying the Web 2.0 environment, I believe the next transformation is clear.

Figure 1 provides a simple chart describing the evolution of the knowledge store we commonly refer to as a repository. In most cases, I use the word "repository" to mean any application within the metadata space. Repository is a generic term to describe any knowledge container. As Figure 1 indicates, the registry focuses on structured information. Hence, the first repositories were registries because they only contained the information that could be placed in tables and rows.

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