[T_S_]

"Embrace and extend." -- Bill Gates

These days that would correspond to forking the spec. So unlike an open source programming, it is not nice to fork the spec.

Or is it?

[zende]

Forking the specs for an API feels just like forking an open source project. I wouldn't want to drudge through Facebook's API code, but it would be nice to comment on changes, have a changelog, and make them auto validate against their own specs.