PUBLIC MARKS with tags semantic & database

DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to make sophisticated queries against Wikipedia, and to link other data sets on the Web to Wikipedia data.

WagN is a deep merger of wiki and tagging—not just a wiki with tagging, but wiki and tags all mashed up together. WagN can do everything a regular wiki can do- but it can also handle data in a way that regular wikis can’t. * WagN is made of cards A card is a chunk of information. * Cards can be connected Whenever two cards are related, you can “connect” them, creating a new card to explain the relationship. * Cards are named with tags A tag is basically just a word or phrase. Every tag has a card that explains it, and every card has a title comprised of one or more tags. A simple card's title is a single tag, while a connection card has a title built from multiple tags.

So what is an inferencing database? It's a database that can garbage collect redundant data.

由 Google Base 講到四個層面的 Web: Document, Data, Semantic 和 World Wide DB