2010 Error "Validation (HTML5): Element 'nav' cannot be be nested within element 'html'"


I am trying to learn a bit of html5. I created a new web application the I changed the Text validation in
Tools/Options/Text Editor/HTML from "XHTML 1.0 Transitional" to "HTML5".
I get the following error in the mark up further down. Have I set this up wrong? I realise that I am shooting in the dark a bit here.

Error: "Validation (HTML5): Element 'nav' cannot be be nested within element 'html'"

My page's mark up code:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="HTML5._Default" %>

<!DOCTYPE html>
<html lang="en">  
    <meta charset="utf-8">    
    <title>My Title</title>  
    <li><a href="Default.aspx">Home</a></li>
    <li><a href="Webform1.aspx">Page 1</a></li>
    <li><a href="Webform2.aspx">Page 2</a></li>

         <!--shorten the link if you are not changing servers-->
     <a href="Webform1.aspx">Page 1</a>

Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAsked:
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Lokesh B RDeveloperCommented:

You need this update - Web Standards Update for Visual Studio 2010 SP1

Check the below links for HTML5 elements support on VS 2010

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Carl TawnSystems and Integration DeveloperCommented:
The nav element is valid, but it still needs to live inside the body element, rather than outside it like you currently have it.
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
Thanks very much
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
Thanks very much
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