# Html

All html has to be html 5 compliant.

## Omitted closing tags

The following closing tags SHOULD be omitted:

* `</li>`
* `</option>`
* `</tr>`
* `</td>`
* `</th>`
* `</thead>`
* `</tbody>`
* `</tfoot>`
* `</head>`
* `</body>`
* `</html>`

The following tags MUST not specify a end tag (\\):

* `<br \>`
* `<meta \>`
* `<input \>`
* `<hr \>`
* `<img \>`
* `<link \>`
* `<source \>`
* `<embed \>`

## Accessible Rich Internet Applications

All modules and themes SHOULD be WAI-ARIA 2.0 compliant. For further reading please refer to https://www.w3.org/TR/WCAG20-TECHS/aria.

## Structured Data (Microdata)

For structured data https://schema.org/ SHOULD be used.