<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html lang="en"> <head> <title>aert1.0/5.2.1</title> </head> <body> <table summary="This data table should use markup to associate multiple levels of row and column headers"> <caption>This data table should use markup to associate multiple levels of row and column headers</caption> <tr> <th>ID</th><th colspan="2">System<br>Color or Name</th><th>Required</th> </tr> <tr> <td>a-1</td><td>blue</td><td></td><td>yes</td> </tr> <tr> <td>a-2</td><td></td><td>Susan</td><td>yes</td> </tr> <tr> <td>a-3</td><td>green</td><td></td><td>no</td> </tr> <tr> <td>a-4</td><td>orange</td><td></td><td>no</td> </tr> <tr> <td>a-5</td><td></td><td>Frank</td><td>yes</td> </tr> <tr> <td>a-6</td><td></td><td>Harold</td><td>no</td> </tr> </table> </body> </html>