XHTML stands for Extensible HyperText Markup Language.
It is a language that branches off of HTML, combining the use of XML syntax with HTML markup; all tags and attributes must be lowercase, all tags must be closed, and tags must be nested properly (as to not overlap one another in a shift).
The requirements to comply with XHTML standards force the use of CSS in the place of specific tags to establish cross-browser compatibility on styles. These standards are issued by the W3C.
XHTML is compatible with all (if not, most) modern browsers.
XHTML stands for Extensible Hypertext Markup Language. It is commonly used to create webpages that are available on the internet, on a local network, or even on a local machine.
HTML is in XHTML, some argue that XHTML is it's own markup
Extensible HyperText Markup Language
XHTML is used as a stricter view of HTML. People who like to make the code clean and nice use XHTML.
The XHTML code for links is anchor tag.It is used to establish hyperlink between two pages.
HTML and XHTML are two different languages used for web and application design. XHTML was a popular choice from about the year 2000, to 2011. HTML 5 is intended to replace XHTML. XHTML followed the basic rules of XML-based languages. HTML (both prior and since) do not.
XHTML can be used to create full and feature-rich websites; any type of website that you could build in HTML4 (except for those using frames) are technically possible in XHTML.
The World Wide Web Consortium, or the W3C. They set the standards and specifications of HTML and XHTML, and how it should be used.
(1) XHTML 1.0 Strict(2) XHTML 1.0 Transitional(3) XHTML 1.0 Frameset
That is what seems to be happening already. XHTML is being used more than normal HTML for modern websites, since it forces better cross-browser compatibility -- meaning that multiple browsers viewing the same page should see the same thing. HTML may never fully take over XHTML; however, at this rate, XHTML will be the markup language most commonly used for webpages.
XHTML and CSS are both languages that are used to make web pages. XHTML is very similar to HTML and serves the same purpose. XHTML & HTML are both used to set the structure of the page - to define images, links, text, headlines, etc. CSS (Cascading Style Sheets) is used to define the style of the page - colors, spacing, etc. If you were to think of a web page as a person, XHTML would be the skeleton, and CSS would be the skin, clothing, make-up, etc.
Many modern websites use XHTML now; although some are still left in the dark, pondering with HTML. Thus, many corporations, businesses, organizations, freelancers, entertainers, general website developers, and others use XHTML.
The currently used ones are HTML 4.01, XHTML 1.0 or 1.1, and HTML5. XHTML has several doctypes available, which are sorta like mini-versions.