<!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>System</th><td>a-1</td><td>Susan</td><td>Macintosh</td> </tr> <tr> <th rowspan="2">ID<br>location or code</th><td>Local</td><td>Building 1</td><td>Front Desk</td> </tr> <tr> <td>Local</td><td>Building 2</td><td>Back Desk</td> </tr> <tr> <th>Required</th><td>yes</td><td>yes<td></td><td>no</td> </tr> </table> </body> </html>