Problems with dx.doi.org on January 20th 2015- what we know

Noticed in https://lists.wikimedia.org/pipermail/wikimedia-l/2015-Janua...

> the DOI resolver site went down today because they apparently forgot to renew the domain, and the author of this blog post from CrossRef (who runs it) suggests relying on us for persistent identifier stability [...] He notes "the “persistence” [of persistent identifiers] is the result of a social contract" -- indeed.

When is a uuid not a uuid? When you can't actually resolve it.