We know Google recently updated their documentation for the rich snippets for articles page by requiring author name but that wasn’t it.

Kyle Sutton posted on Google+, which I spotted via seoskeptic.com that Google made several changes there specific to AMP.

Kyle wrote:

John Mueller indirectly replied on Twitter that some of these changes are specific to AMP. He wrote:

This question was also asked in a Google hangout this morning at 35:22 mark:

Question:

Answer: YES, he said.

He said look at the archive.org to see the old documentation and they are working on making this all clearer, i.e. what is AMP specific and what is not.

Forum discussion at Google+.