First time accepted submitter blottsie (3618811)
writes "A new project proposes to do away with dead 404 errors by implementing a new HTML attribute that will help access prior versions of hyperlinked content. With any luck, that means that you'll never have to run into a dead link again. ... The new feature would come in the form of introducing the mset attribute to the <a> element, which would allow users of the code to specify multiple dates and copies of content as an external resource."
attribute would specify a "reference candidate:" either a temporal reference (to ease finding the version cited on e.g. the wayback machine) or the url of a static copy of the linked document.