In September 1997, Oskoboiny began working for the W3C, and on December 18, 1997, the W3C announced its W3C HTML Validator based upon his works.
U Septembru 1997. godine, Oskoboiny je počeo da radi za W3C, i 18. decembra 1997. godine W3C je objavio W3C HTML Validator zasnovan na njegovim delima.