AI 50 have been applied incorrectly

While reviewing the schemas I've observed that AI 50 have been applied
incorrectly. According to the current spec, section 5.2 basic structure of
the language, <import> must occur before <extensions>. IMHO the intention
of AI 50 was to only adapt the text in section 5.4, paragraph 3 saying "...
Any number of <import> elements may appear as initial children of the
<process> element, before any other child element. ...". The intention was
not to change the ordering (this would be a normative change).

If nobody objects I'll open another AI to undo this change and to apply the
intended resolution of AI 50.

Best regards/Mit freundlichen Grüßen,

       Thomas Schulze