There is a (defunct?) W3C working group about this, see https://www.w3.org/community/httpslocal/ https://www.w3.org/community/httpslocal/ and https://github.com

There is a (defunct?) W3C working group about this, see https://www.w3.org/community/httpslocal/ https://www.w3.org/community/httpslocal/ and https://github.com/httpslocal https://github.com/httpslocal