| Error | % of Docs | # Docs |
|---|---|---|
| no-head | 41% | 37498 |
| html-outer | 40% | 37124 |
| head-element | 38% | 34882 |
| netscape-markup | 34% | 31433 |
| no-body | 32% | 29308 |
| must-follow | 30% | 27556 |
| netscape-attribute | 29% | 27145 |
| unclosed-element | 27% | 24439 |
| mis-match | 22% | 20404 |
| heading-order | 19% | 17886 |
| unknown-element | 16% | 15040 |
| body-no-head | 12% | 10942 |
| unknown-attribute | 8% | 7542 |
| odd-quotes | 7% | 6147 |
| element-overlap | 6% | 5925 |
| required-context | 6% | 5586 |
| once-only | 5% | 5018 |
| nested-element | 5% | 4980 |
| no-title | 5% | 4514 |
| non-head-element | 5% | 4394 |
| literal-metacharacter | 2% | 1912 |
| unexpected-open | 2% | 1669 |
| required-attribute | 1% | 1269 |
| illegal-closing | 1% | 1257 |
| repeated-attribute | 1% | 1175 |
| require-head | 1% | 1104 |
| closing-attribute | 1% | 996 |
| markup-in-comment | 1% | 759 |
| unclosed-comment | 1% | 563 |
| expected-attribute | 1% | 492 |
| obsolete | 0% | 307 |
| leading-whitespace | 0% | 211 |
| attribute-delimiter | 0% | 38 |
| mixed-case | 0% | 0 |
| directory-index | 0% | 0 |