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This is an old question—I found it because I was looking for the same information. In case anyone needs this answer, this is what I found. Also, this. In brief, yes, cross-domain canonicals are appropriate for syndication.

OK, I see.... Thank you very much Kate Morris.

Thank you very much! I will be taking a deeper look into both Pete's post as well as the schema.org Best Regards

Guys, Thank you very much. I really did appreciate the fast response and it did help me clear a few doubts and misconceptions. Koki

Thank you very much. This is helpful. Sincerely, Koki