Peter, Eugene, I think we've reached consensus here (have these words ever been said in an OSM mailing list? :-D ). Of the tags Eugene listed about the restaurant in Berlin, I'd only tentatively keep link:facebook and link:google+, but I am not able to judge how much of the content is relevant and how much of it is just customers reviews.
Peter, I am just a little bit dubious about the guideline you described. A good marketing campaign would include (if multiple social services are used) a website with the main content and regular posts on the social networks about instant news. Usually the website would have a link to those social networks, so tagging the website alone would be all that's needed. However, suppose the website of a restaurant shows one type of information (maybe something static like the menu) and all the "important" news is on the restaurant's Facebook page, which is not linked to from the site. Or suppose that different services (the website, the Facebook page, and the Twitter stream) provided different kinds of information and contact. Would you be for or against tagging them all, in that case? Regards, Simone
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