> examples of DOI links that supposedly will never break I looked in the FAQ and related materials from that 2005 mirror, and didn't see where they said the li

> examples of DOI links that supposedly will never break I looked in the FAQ and related materials from that 2005 mirror, and didn't see where they said the links would never break. Did they promise to archive every resolvable DOI in case a registration agency should go out of business or stop being a registration agency? FWIW, here's what I found: doi:10.1038/35057062 - works doi:10.1002/0470841559.ch1 - works doi:10.1228/0103000001002 - does not work. Neither DDG nor Google Scholar know of the whitepaper "Secure Internet Delivery of High Value Content". The source organization, "Lon Inc." does not seem to exist, or at least, http://loninc.com/ http://loninc.com/ does not resolve. doi:10.1228/0103000001009 - does not resolve. Also from "Lon Inc." doi:10.1430/8105 - resolves to https://www.medra.org/servlet/MREngine?hdl=10.1430/8105 https://www.medra.org/servlet/MREngine?hdl=10.1430/8105 resolving in turn to https://www.rivisteweb.it/doi/10.1430/8105 https://www.rivisteweb.it/doi/10.1430/8105 . doi:10.1392/BC1.0 - works doi:10.1786/SIBQK6AD8RNA - does not work. The corresponding document appears to be https://www.legislation.gov.uk/ukpga/2003/4/section/4 https://www.legislation.gov.uk/ukpga/2003/4/section/4 , with no associated doi. The other four DOIs from The Stationery Office UK Official Publications Catalog also do not resolve. While I can find the press release notice when TSO applied DOIs to UKOP (at http://www.doi.org/news/TSO-UKOPPressRelease.pdf http://www.doi.org/news/TSO-UKOPPressRelease.pdf ), I cannot find why they decided to no longer use or support DOIs. It looks like one registration agency went out of business and another stopped supporting DOIs. What should DOI have done to improve things to your satisfaction? Sci-Hub works well with DOIs, and without festooned notices and the like. ;)