Access: [5.1.2.1]: data <table> missing row/column headers (all)
(Priority 1)

Cause:

Data tables must include headers for each row and column. Use the "headers" attribute to attach labels to table rows and columns via the "id" attribute. This creates a link between headings and their associated data cells.

Testfile:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
	"http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>aert1.0/5.1.2</title>
</head>
<body>

<table summary="This data table is missing row/column headers">
	<caption>This data table is missing row/column headers</caption>

	<tr>
		<td>age</td><td>height</td><td>weight</td>
	</tr>
	<tr>
		<td>10</td><td>1.3 m</td><td>50 kg.</td>
	</tr>
	<tr>
		<td>15</td><td>1.8 m</td><td>75 kg.</td>
	</tr>
	<tr>
		<td>20</td><td>2.1 m</td><td>100 kg.</td>
	</tr>
</table>

</body>
</html>

References:

W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/