2 1: 'ls', // WHATWG Living Standard
3 2: 'rec', // W3C Recommendation
4 3: 'pr', // W3C Proposed Recommendation
5 4: 'cr', // W3C Candidate Recommendation
6 5: 'wd', // W3C Working Draft
7 6: 'other', // Non-W3C, but reputable
8 7: 'unoff' // Unofficial, Editor's Draft or W3C "Note"