Arduino shields on Yun hardware

I need some information. I developed a specialist shield so we could test a small card we were developing. I did the work on a Uno. I am now transitioning to Yun hardware. It is clear that I can plug the shield into the Yun but I am not sure of the IO pin complatability between the 2 boards - I need to check this. Is there some reference that lists this information?

Thanx in advance, Al

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