The references all need to be checked for - actual use in the spec - normative vs. informative - links to latest published version This sort of thing is done automatically by tools like bikeshed, but needs to be periodically done manually here. See also https://github.com/w3c/svgwg/issues/71 https://github.com/w3c/svgwg/issues/227 https://github.com/w3c/svgwg/issues/365