This repo used to hold the specification defining the Preload relationship of the HTML Link element. Its processing has now been fully integrated into HTML: https://un5nj90kzk5vf152hgyfw29h1eja2.julianrbryant.com/multipage/links.html#link-type-preload
Any issues should be filed against the HTML spec: https://github.com/whatwg/html/issues