Semantic Web: "You cannot have an H3 without a previous H2."led-digest.com1 pointpshapiro16 years agoW3C's HTML Test Suite tests 37-41 indicate that in pre-XHTML2, header tags must not be used out of order or non-sequentially.See also: http://www.w3.org/WAI/GL/WCAG20/tests/test37.html