What is the correct way to declare an HTML5 Doctype.
Matthew Barrera 
What is the correct way to use start tag when creating with HTML5
IE: HTML 4 Strict is like this
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" ""> 10 Answers
The standard has been simplified because the previous doctypes were too cryptic. The new doctype is simply <!DOCTYPE html> . You may wonder why it is not <!DOCTYPE html5> but it is simply because it is just an update to the standard of HTML and not a new version of anything. As you can see below, all elements can now have a language attribute.
The
<html>element is the root element of a document. Every document must begin with this element, and it must contain both the<head>and<body>elements.It is considered good practice to specify the primary language of the document on this element using the lang attribute.
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="utf-8"> <title>Hello World</title> </head> <body> <h1>Hello World</h1> <p> Jamie was here. </p> </body>
</html>More info:
you just use
<!DOCTYPE html>
<html>
</html>First of all, html5 doctype is not case sensitive.
Either one of these three will work:
1) <!DOCTYPE html>
2) <!DOCTYPE HTML>
3) <!doctype html>
You can check the validity here.
It's as simple as
<!DOCTYPE html>According to the WWW Consortium, the organization responsible setting current web standards, no one has answered this correctly. The current standard for language declaration is
Always use a language attribute on the html tag to declare the default language of the text in the page. When the page contains content in another language, add a language attribute to an element surrounding that content. Use the lang attribute for pages served as HTML, and the xml:lang attribute for pages served as XML. For XHTML 1.x and HTML5 polyglot documents, use both together.
W3C HTML Language Tag Page
Here is the answer regarding DOCTYPE declaration
Use the following markup as a template to create a new HTML document using a proper Doctype declaration. See the list below if you wish to use another DTD.
W3C DOCTYPE Standards
<!DOCTYPE html>
<html>
<head> <title>An HTML standard template</title> <meta charset="utf-8" />
</head>
<body> <p>… Your HTML content here …</p>
</body>
</html>Hope this helps.
1You use...
<!DOCTYPE html> followed by your HTML tag etc..
You only need this:
<!DOCTYPE html>
<html>
...There are several points here. This is supported by all browsers, even old ones like IE6/IE7. All browsers actually nee "html" part from doctype declaration to jump into standards mode.
<!-- simplified doctype works for all previous versions of HTML as well -->
<!doctype html>Learning Resource:
The start tag <html> is optional in HTML5, as in HTML 4.01. If used, it must be the first tag. It has different optional attributes: the global attributes of HTML5, and the special manifest attribute. The most common useful attribute in the <html> tag is the lang attribute.
(The doctype declaration is something quite different, and not a tag at all.)
2The clearest most definitive answer of what the standard says seems to be for HTML 5.3 at:
Note especially the list-items 1 and 3 which specify that the doctype-statement is case-insensitive. Also note the number of spaces inside the statement can vary.
And note the clause "A DOCTYPE is a required preamble."
