From my own notes on minimal HTML5… Closing tags are optional for the following tags: html head body p dt dd li option thead th tbody

From my own notes on minimal HTML5… Closing tags are optional for the following tags: html head body p dt dd li option thead th tbody tr td tfoot colgroup The following tags are self-closing and should not have closing tags: meta img input hr br Attributes can be left unquoted if the following characters don’t appear in the attribute value: - Single quote (') - Double quote (") - Space ( ) - Equal sign (=) - Greater-than sign (>)