Comment Political reasons for URIs to change (Score 4, Interesting) 72
I always thought that URIs were supposed to handle precisely this - that they were supposed to be unique, universally accessible identifiers for contents and resources - identifiers that, once assigned, wouldn't need to be changed to access the same contents or resources in the future.
That's the intent: cool URIs don't change. But in the real world, URIs disappear for political reasons. One is the change in organizational affiliation of an author. This happens fairly often to documents hosted "for free" on something like Tripod/Geocities, a home ISP's included web space, or a university's web space. Another is the sale of exclusive rights in a work, invention, or name to a third party. A third is the discovery of a third party's exclusive rights in a work, invention, or name that make it no longer possible to continue to offer a work at a given URI.