HTML Versions: The following table represents the years and versions
| Version | Year |
| HTML | 1991 |
| HTML 2.0 | 1995 |
| HTML 3.2 | 1997 |
| HTML 4.01 | 1999 |
| XHTML | 2000 |
| HTML5 | 2014 |
Simple HTML document :
<!DOCTYPE html>
<html>
<head><title>Page Title</title></head>
<body>
<h1>My First Heading</h1>
<p>My first paragraph.</p>
</body>
</html>
DOCTYPE :
- “DOCTYPE” means HTML document type.
- Every HTML document requires a document type declaration.
- The DOCTYPE declaration defines the document type to be HTML.
- It tells a validator about the version is using in HTML document to be interprete.
- The <!DOCTYPE> declaration helps the browser to display a web page correctly.
- There are several document types on the web.
- To display a document correctly, the browser must know both type and version.
- The doctype declaration is not case sensitive. All cases are acceptable.
- Earlier doctype declarations were hard-to-remember.
For XHTML 1.0 Strict:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
And for HTML4 Transitional:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
HTML5 provides solution, in HTML5 document we just need to provide “DOCTYPE” element as follows.
<!DOCTYPE html>
<!DOCTYPE HTML>
<!doctype html>
<!Doctype Html>Note: All the above declarations are true.
