Simon Willison’s Weblog

Draconian failure on error is not the answer problems of Postel’s law. Draconian error handling creates an unstable equilibrium in Game Theory terms —it only lasts until one player breaks the rule. One non-Draconian XML5 implementation in key client product and the Draconian XML ranks would break. Well-specified error recovery is the right way to implement the liberal part of Postel’s law.

Henri Sivonen