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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head>
+
+<title>HTMLPurifier Progress</title>
+
+<style type="text/css">
+thead tr {background-color:#EEE;}
+td {padding-right:1em;border-bottom:1px solid #CCC;}
+th {text-align:left;padding-top:1.4em;font-size:13pt;}
+thead th {text-align:left;padding:0.1em;}
+</style>
+
+</head><body>
+
+<h1>HTMLPurifier Progress</h1>
+
+<h2>Attributes</h2>
+
+<table frame="hsides" rules="groups">
+
+<thead>
+<tr><th>Attribute</th><th>Tags</th><th>Notes</th></tr>
+</thead>
+
+<!--
+<tr><th></th></tr>
+<tbody>
+<tr><td></td><td></td><td></td></tr>
+</tbody>
+-->
+
+<tbody>
+<tr><th>CSS</th></tr>
+<tr><td>style</td><td>All</td><td>Needs CSS parser</td></tr>
+</tbody>
+
+<tbody>
+<tr><th>Questionable</th></tr>
+<tr><td>accesskey</td><td>A</td><td>May interfere with main interface</td></tr>
+<tr><td>tabindex</td><td>A</td><td>May interfere with main interface</td></tr>
+<tr><td>target</td><td>A</td><td>Config? (only useful for frame layouts)</td></tr>
+</tbody>
+
+<tbody>
+<tr><th>Miscellaneous</th></tr>
+<tr><td>datetime</td><td>DEL, INS</td><td>No visible effect</td></tr>
+<tr><td>rel</td><td>A</td><td>Largely user-defined</td></tr>
+<tr><td>rev</td><td>A</td><td>Largely user-defined</td></tr>
+<tr><td>axis</td><td>TD, TH</td><td>W3C only: No browser implementation</td></tr>
+<tr><td>char</td><td>COL, COLGROUP, TBODY, TD,<br />TFOOT, TH, THEAD, TR</td><td>W3C only: No browser implementation</td></tr>
+<tr><td>headers</td><td>TD, TH</td><td>W3C only: No browser implementation</td></tr>
+<tr><td>scope</td><td>TD, TH</td><td>W3C only: No browser implementation</td></tr>
+</tbody>
+
+<tbody>
+<tr><th>URI</th></tr>
+<tr><td rowspan="2">cite</td><td>BLOCKQUOTE, Q</td><td></td></tr>
+    <tr><td>DEL, INS</td><td></td></tr>
+<tr><td>href</td><td>A</td><td></td></tr>
+<tr><td>longdesc</td><td>IMG</td><td></td></tr>
+<tr><td>src</td><td>IMG</td><td>Required</td></tr>
+</tbody>
+
+<tbody>
+<tr><th>Transform</th></tr>
+<tr><td rowspan="4">align</td><td>CAPTION</td><td></td></tr>
+    <tr><td>IMG</td><td></td></tr>
+    <tr><td>TABLE</td><td></td></tr>
+    <tr><td>HR</td><td></td></tr>
+<tr><td>alt</td><td>IMG</td><td>Required</td></tr>
+<tr><td rowspan="3">bgcolor</td><td>TABLE</td><td></td></tr>
+    <tr><td>TR</td><td></td></tr>
+    <tr><td>TD, TH</td><td></td></tr>
+<tr><td rowspan="3">bgcolor</td><td>TABLE</td><td></td></tr>
+    <tr><td>TR</td><td></td></tr>
+    <tr><td>TD, TH</td><td></td></tr>
+<tr><td>border</td><td>IMG</td><td></td></tr>
+<tr><td>clear</td><td>BR</td><td></td></tr>
+<tr><td>compact</td><td>DL, OL, UL</td><td>Boolean</td></tr>
+<tr><td>dir</td><td>BDO</td><td>Required</td></tr>
+<tr><td>height</td><td>TD, TH</td><td></td></tr>
+<tr><td>hspace</td><td>IMG</td><td></td></tr>
+<tr><td rowspan="2">name</td><td>IMG</td><td></td></tr>
+    <tr><td>A</td><td></td></tr>
+<tr><td>noshade</td><td>HR</td><td>Boolean</td></tr>
+<tr><td>nowrap</td><td>TD, TH</td><td>Boolean</td></tr>
+<tr><td>size</td><td>HR</td><td></td></tr>
+<tr><td>start</td><td>OL</td><td></td></tr>
+<tr><td rowspan="3">type</td><td>LI</td><td></td></tr>
+    <tr><td>OL</td><td></td></tr>
+    <tr><td>UL</td><td></td></tr>
+<tr><td>value</td><td>LI</td><td></td></tr>
+<tr><td>vspace</td><td>IMG</td><td></td></tr>
+<tr><td rowspan="2">width</td><td>HR</td><td></td></tr>
+    <tr><td>TD, TH</td><td></td></tr>
+</tbody>
+
+</table>
+
+<h3>CSS</h3>
+
+<p>Coming soon...</p>
+
+</body></html>
\ No newline at end of file

Attribute	Tags	Notes
CSS
style	All	Needs CSS parser
Questionable
accesskey	A	May interfere with main interface
tabindex	A	May interfere with main interface
target	A	Config? (only useful for frame layouts)
Miscellaneous
datetime	DEL, INS	No visible effect
rel	A	Largely user-defined
rev	A	Largely user-defined
axis	TD, TH	W3C only: No browser implementation
char	COL, COLGROUP, TBODY, TD, TFOOT, TH, THEAD, TR	W3C only: No browser implementation
headers	TD, TH	W3C only: No browser implementation
scope	TD, TH	W3C only: No browser implementation
URI
cite	BLOCKQUOTE, Q
cite	DEL, INS
href	A
longdesc	IMG
src	IMG	Required
Transform
align	CAPTION
	IMG
	TABLE
	HR
alt	IMG	Required
bgcolor	TABLE
	TR
	TD, TH
bgcolor	TABLE
	TR
	TD, TH
border	IMG
clear	BR
compact	DL, OL, UL	Boolean
dir	BDO	Required
height	TD, TH
hspace	IMG
name	IMG
name	A
noshade	HR	Boolean
nowrap	TD, TH	Boolean
size	HR
start	OL
type	LI
	OL
	UL
value	LI
vspace	IMG
width	HR
width	TD, TH