On 6/15/2017 11:35 AM, Christian Huitema wrote: > Martin describes a very real failure mode. Implementations deviate from > the standard, gain market share as the deviations are happily tolerated, > and then prevent standard evolution that would contradict their own > "extensions". Martin gives examples of that happening with JSON. Agreed. It's very important to separate errors that diverge from specification details from reasonable "wiggle room" created by specification gaps. The Postel principle addresses the latter, but was never intended to accommodate the former. Joe