THis file demonstrates default text within the form control is invalid (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>aert1.0/13.1.1</title>
</head>
<body>
<form action="">
<label for="control1">Some text:</label>
<input id="control1" value="        " type="text" />
</form>
</body>
</html>