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Answer 1

+6 A:

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.

Oded 2010-08-12 20:47:50

Thanks for the response. I'm not quite sure what that all means though. What would I have to change in my code to correct the problem?

blcArmadillo 2010-08-12 20:51:35

@blcArmadillo - the [DTD](http://www.w3.org/TR/html4/strict.dtd) is the definition of HTML 4.01 Strict and that's what it validates against. In short, one of the elements (tags) above should be immediately after the `<form>` tag. Since `<input>` is not in the list, it is not valid immediately inside the `<form>` tag.

Oded 2010-08-12 20:54:07

It's worth adding that there's another rule beyond this. The above production only says that you can't have a form immediately inside a form (`<form><form>...</form></form>`). In fact, you can't have a form anywhere inside a form, but that can't be expressed in a DTD (likewise, you can't have an `<a>` anywhere inside an `<a>`).

Jon Hanna 2010-08-12 21:41:31

Answer 2

+1 A:

Played around with it a bit--put a "div" tag around the "input" tag:

<div>
    <input type="text" name="testfield">
</div>

Russ 2010-08-12 20:52:53

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HTML 4.01 Strict Standards

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