<!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>