URL gives way to name, gateway gives access to environment variables. People thought resources were static from the start, but they weren't. Win32 is extensible too, but by contrast it is only extensible by the developer of the app. Crystallize, promulgate, yank it forward, look ahead. Outline of this paper.
PEP is a unified conceptual model of what an extension is.
Isomorph to active page or active proxy. Evolutionarily better than custom developed Wev servers. References List of standard references with authors name, etc. He was previously on the technical staff of the World Wide Web Consortium at MIT, where he focused on security and electronic commerce issues. He has been involved in the development of cryptographic software tools and Web-related standards development.