Write a minimum of 5-6 paragraphs concerning Shirky's paper. Be sure and answer the following within your text:

1. What is an ontology?

2. What is tagging?

3. What is del.icio.us?

4. How is del.icio.us fundamentally different than what Yahoo's categorized web provides? How is it better? How is it worse?

As always, provide a "take" on the topic. What do you think?