While xhtml was nicer to parse, xhtml only described how to render a valid page . How often are pages like that in the wild, even if the page itself is fine som

While xhtml was nicer to parse, xhtml only described how to render a valid page . How often are pages like that in the wild, even if the page itself is fine some user add on or script can put other stuff in, possibly invalid. HTML5 described is so complex because it it unlike XML and it's strict validity, HTML5 works with even the most mangled tag soup