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Asked: 2026-05-16T05:35:35+00:00

I just ran this simple code through the w3c validation service ( http://validator.w3.org/check ).

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I just ran this simple code through the w3c validation service (http://validator.w3.org/check). Here is the code I’m running through:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
    "http://www.w3.org/TR/html4/strict.dtd"
    >
<html lang="en">
<head>
    <title><!-- Insert your title here --></title>
</head>
<body>
<form name="testform" action="/" method="post">
    <input type="text" name="testfield">
</form>
</body>
</html>

I’m getting the following error on the input field:

Line 10, Column 40: document type does
not allow element “INPUT” here;
missing one of “P”, “H1”, “H2”, “H3”,
“H4”, “H5”, “H6”, “PRE”, “DIV”,
“ADDRESS” start-tag

I don’t see anything wrong with it. Any ideas?

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1 Answer

  1. Editorial Team

    The problems is with how the FORM element is define in the DTD:

    <!ELEMENT FORM - - (%block;|SCRIPT)+ -(FORM) -- interactive form -->

    So, it can either have a %block (except for FORM) or SCRIPT element.

    And %block is defined as:

    <!ENTITY % block
 "P | %heading; | %list; | %preformatted; | DL | DIV | NOSCRIPT |
  BLOCKQUOTE | FORM | HR | TABLE | FIELDSET | ADDRESS">

    And the rest:

    <!ENTITY % heading "H1|H2|H3|H4|H5|H6">

<!ENTITY % list "UL | OL">

<!ENTITY % preformatted "PRE">

    Since your form does not contain any of these as a direct child, the page failed validation.

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