Dreamweaver html validation issue: "Tag must be paired"
Question
I'm wondering if this is a quirk in Dreamweaver: The first tag in my html5 document is:
<!doctype html>
...and the last tag is:
</html>
When validating the document (W3C) from within Dreamweaver, I get this error:
Tag must be paired, no start tag: [ </html> ]
Could it be that Dreamweaver doesn't recognize the first tag with?doctype?
1 answers
solution1
1 ACCPTED 2021-05-21 19:41:26
<!doctype html> is not an opening-tag. It's an SGML doctytpe declaration.
The <html> opening tag goes after it, like so:
<!doctype html>
<html>
<head>
</head>
<body>
</body>
</html>
Backstory: SGML doctype declarations are usually far more complicated, and when HTML was ostensibly an application of SGML (eg in HTML4.01) then HTML documents needed full-form SGML DTDs like this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
...however, ever since HTML5 was declared as "a living standard" without version numbers, and no-longer either SGML nor XML (rip XHTML) there was no need for a HTML5 DTD anymore, but for compatibility purposes the W3C and WHATWG said that <!doctype html> (without the older SGML PUBLIC / SYSTEM parts, and without a URI to the actual DTD) should be used.
See here for details: Where is the HTML5 Document Type Definition?
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