From Extensibility to Evolvability

10/25/99


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Table of Contents

From Extensibility to Evolvability

Overview of Talk

Why Extensions?

What is an Extension?

Once Upon a Time...

Then HTTP/1.0 came along

And Much More FollowedÖ

Thanks to HTTPís Architecture

The Good PartÖ

And the Bad PartÖ

Extensibility vs Evolvability

Interoperability vs. Evolvability

Supporting Evolvability

The Four Rules of Evolvability

HTTP Extension Framework

Example of Mandatory Ext.

Example of Optional Ext.

Extension Declaration Params

Extension Declarations

Server Response

Client Response

Author: Henrik Frystyk

Email: frystyk@microsoft.com

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