Leonard Richardson, Sam Ruby
2008년 저작이라서 좀 오래됐음.
Chapter 1. The Programmable Web and Its Inhabitants
Kinds of Things on the Programmable Web
The programmable web is based on HTTP and XML. Some parts of it serve HTML, JavaScript Object Notation (JSON), plain text, or binary documents, but most parts use XML. And it’s all based on HTTP: if you don’t use HTTP, you’re not on the web.