diff --git a/src/element-belongs-to.lisp b/src/element-belongs-to.lisp
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+++ b/src/element-belongs-to.lisp
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+(in-package :flute)
+
+(defparameter *attribute-belongs-to*
+  '((accept	input)
+    (accept-charset	form)
+    (accesskey	*)
+    (action	form)
+    (alt	area img input)
+    (async	script)
+    (autocomplete	form input)
+    (autofocus	button input select textarea)
+    (autoplay	audio video)
+    (charset	meta script)
+    (checked	input)
+    (cite	blockquote del ins q)
+    (class	*)
+    (cols	textarea)
+    (colspan	td th)
+    (content	meta)
+    (contenteditable	*)
+    (controls	audio video)
+    (coords	area)
+    (data	object)
+    (data-*	*)
+    (datetime	del ins time)
+    (default	track)
+    (defer	script)
+    (dir	*)
+    (dirname	input textarea)
+    (disabled	button fieldset input optgroup option select textarea)
+    (download	a area)
+    (draggable	*)
+    (dropzone	*)
+    (enctype	form)
+    (for	label output)
+    (form	button fieldset input label meter object output select textarea)
+    (formaction	button input)
+    (headers	td th)
+    (height	canvas embed iframe img input object video)
+    (hidden	*)
+    (high	meter)
+    (href	a area base link)
+    (hreflang	a area link)
+    (http-equiv	meta)
+    (id	*)
+    (ismap	img)
+    (kind	track)
+    (label	track option optgroup)
+    (lang	*)
+    (list	input)
+    (loop	audio video)
+    (low	meter)
+    (max	input meter progress)
+    (maxlength	input textarea)
+    (media	a area link source style)
+    (method	form)
+    (min	input meter)
+    (multiple	input select)
+    (muted	video audio)
+    (name	button fieldset form iframe input map meta object output param select textarea)
+    (novalidate	form)
+    (onabort	audio embed img object video)
+    (onafterprint	body)
+    (onbeforeprint	body)
+    (onbeforeunload	body)
+    (onblur	All visible elements.)
+    (oncanplay	audio embed object video)
+    (oncanplaythrough	audio video)
+    (onchange	All visible elements.)
+    (onclick	All visible elements.)
+    (oncontextmenu	All visible elements.)
+    (oncopy	All visible elements.)
+    (oncuechange	track)
+    (oncut	+)
+    (ondblclick	+)
+    (ondrag	+)
+    (ondragend	+)
+    (ondragenter	+)
+    (ondragleave	+)
+    (ondragover	+)
+    (ondragstart	+)
+    (ondrop	+)
+    (ondurationchange	audio video)
+    (onemptied	audio video)
+    (onended	audio video)
+    (onerror	audio body embed img object script style video)
+    (onfocus	+)
+    (onhashchange	body)
+    (oninput	+)
+    (oninvalid	+)
+    (onkeydown	+)
+    (onkeypress	+)
+    (onkeyup	+)
+    (onload	body iframe img input link script style)
+    (onloadeddata	audio video)
+    (onloadedmetadata	audio video)
+    (onloadstart	audio video)
+    (onmousedown	+)
+    (onmousemove	+)
+    (onmouseout	+)
+    (onmouseover	+)
+    (onmouseup	+)
+    (onmousewheel	+)
+    (onoffline	body)
+    (ononline	body)
+    (onpagehide	body)
+    (onpageshow	body)
+    (onpaste	+)
+    (onpause	audio video)
+    (onplay	audio video)
+    (onplaying	audio video)
+    (onpopstate	body)
+    (onprogress	audio video)
+    (onratechange	audio video)
+    (onreset	form)
+    (onresize	body)
+    (onscroll	+)
+    (onsearch	input)
+    (onseeked	audio video)
+    (onseeking	audio video)
+    (onselect	+)
+    (onstalled	audio video)
+    (onstorage	body)
+    h(onsubmit	form)
+    (onsuspend	audio video)
+    (ontimeupdate	audio video)
+    (ontoggle	details)
+    (onunload	body)
+    (onvolumechange	audio video)
+    (onwaiting	audio video)
+    (onwheel	+)
+    (open	details)
+    (optimum	meter)
+    (pattern	input)
+    (placeholder	input textarea)
+    (poster	video)
+    (preload	audio video)
+    (readonly	input textarea)
+    (rel	a area link)
+    (required	input select textarea)
+    (reversed	ol)
+    (rows	textarea)
+    (rowspan	td th)
+    (sandbox	iframe)
+    (scope	th)
+    (selected	option)
+    (shape	area)
+    (size	input select)
+    (sizes	img link source)
+    (span	col colgroup)
+    (spellcheck	*)
+    (src	audio embed iframe img input script source track video)
+    (srcdoc	iframe)
+    (srclang	track)
+    (srcset	img source)
+    (start	ol)
+    (step	input)
+    (style	*)
+    (tabindex	*)
+    (target	a area base form)
+    (title	*)
+    (translate	*)
+    (type	button embed input link menu object script source style)
+    (usemap	img object)
+    (value	button input li option meter progress param)
+    (width	canvas embed iframe img input object video)
+    (wrap	textarea)))