Some versions are not just similar to, but actually valid, XML (extensible markup language.) HTML also bears a resemblance to the my older SGML.
WML (Wireless Markup Language)
XHTML is an aberration for Extensive Hyper Text Markup Language. It is the tighter form of HTML but is similar.
XHTML documents use the same HTML extension. They are similar just are more strict than the former.
They are not programming languages and do not create programs, so they don't need a compiler. A browser opens a web page and reads the HTML or XHTML and displays it, more like an interpreter would.
A WYSIWYG (What You See Is What You Get) editor allows a web page creator to visually move elements around on a rendered page, rather than writing raw HTML code and using a browser to render it. Obviously, the level of skill required when instant feedback is available is significantly less than if one were to write HTML code, as the editor removes the need for the HTML/CSS code to be interpreted by the author at the time the page is created. Some WYSIWYG editors are so good at producing good HTML, that they can be employed by individuals with no HTML/CSS experience whatsoever and achieve good, valid HTML that does as the user intended.
I call HTML the "display" language because it doesn't proccess anything CSS is the more putting it together, HTML just puts the stuff on your screen. If I was going to say what is a similar web dev language I would say CSS.
HTML is not compiled. It is not a programming language. It is open and read by a browser. The process is similar to what an interpreter would do.
JSP and HTML are similar in some way or other. JSP is one which has work on Java Programming as well.
The answer is :  
To view the source code of an HTML document, open it using Notepad or a similar text processor (Notepad is best for HTML editing). To view the HTML document as it would look on the Internet, open it with any web browser.
Only the HTML tags differ Atom Feed is similar to RSS Fees but it differ only in HTML tag
WML (Wireless Markup Language)
No, XHTML is a parallel language to HTML. XHTML is a XML language definition where tags have similar meanings to corresponding HTML tags. A crude analogy would be that XHTML and HTML are half-brothers; Lot's of similarities but also distinct differences. The successor of HTML is HTML5, the successor of XHMTL is XHTML5.
Table is a physical construct that has rows and columns. It similar in many forms to a database.
HTML stands for Hyper Text Markup Language. If you've noticed most URLs end in .html, it is what almost all webpages are written in. XML stands for Extensible Markup Language. It is similar in format to HTML, but everything can be changed by the user. It is usually used to store information for use by computers.
XHTML is an aberration for Extensive Hyper Text Markup Language. It is the tighter form of HTML but is similar.
In HTML 4, 5 and XHTML 1.0 the <cite> tag is used in conjunction with the <blockquote> or <q> tags to provide a URL from which the quote originated. It's used in a manner similar to a foot-note in MLA style. See the W3C link for the specification in HTML 4.