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tr.im was a URL shortening service that has gone offline. The Google search for site:microformats.org microformats wiki has used tr.im in the past, and we're in the process of fixing them to use ufs.cc/w/ links instead.
This page is for documenting specific tr.im shortlinks and where they used to go to.
In particular, let's document old tr.im links as internal wiki redirects so that if someone searches for tr.im URLs to figure out what happened to them, there's a chance they'll find the equivalent here.