We have a possible duplicate content issue based on the fact that we have a number of websites run from the same code base across .com / .co.uk / .nl / .fr / .de and so on. We want to update our sitemaps alongside using the href lang tags to ensure Google knows we've got different versions of essentially the same page to serve different markets.
Google has written an article on tackling this:https://support.google.com/webmasters/answer/75712?hl=en but my question remains whether having a single sitemap accessible from all the international domains is the best approach here or whether we should have individual sitemaps for each domain.
