SATN has an excellent article on understanding the difference between names and their content. The piece begins with a very lucid description of the end-to-end model of the Internet, and explains why making domain names brittle could lead to increasing the brittleness of the Internet.
Side note: I have a fondness in my heart for SATN. They were my first paid writing gig other than magazine articles and reviews. They paid well and copyedited my words much better than any of the magazines for whom I wrote.
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