This file demonstrates a <table> that has invalid header abbreviations (spaces).

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>aert1.0/5.6.1</title>
</head>
<body>

<table summary="These table headers have invalid abbreviations">
    <caption>These table headers have invalid abbreviations (spaces)</caption>

    <tr><th abbr="    ">Age Of All Recent Residents Of The GTA</th><th abbr="    ">Income Level Specified In English Pounds</th></tr>
    <tr><td>19</td><td>7000</td></tr>
    <tr><td>29</td><td>19000</td></tr>

</table>

</body>
</html>