Hello. At the moment I'm translating "Selectors API Level 1"  and it seems I have noticed a typo in the original document.
 https://www.w3.org/TR/selectors-api/ Section 6.4: "If result is invalid ([SELECT], section 12), raisea a SYNTAX_ERR exception ([DOM-LEVEL-3-CORE], section 1.4) and abort this algorithm." Probably it meant "raise a SYNTAX_ERR" instead "raisea a SYNTAX_ERR"? Best regards, Kirill, http://topolyan.com/