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XHTML Tutorial: http://www.w3schools.com/xhtml/. XHTML Reference Books. * HTML for the World Wide Web, Fifth Edition, with XHTML and CSS: Visual QuickStart …

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XHTML ESSENTIALS
Introduction
HTML, or HyperText Markup Language, is the authoring language that describes how a Web page should be displayed by a Web browser. It has two essential features: hypertext and universality. Hypertext means when a visitor clicks a link on a Web page, the visitor is led to another Web page or document. Universality means that because HTML documents are saved as text files, virtually any computer can read a Web page.1 XHTML, or eXtensible HyperText Markup Language, is a later version of HTML that includes additional standards set forth by the international organization called the World Wide Web Consortium (W3C).
Both HTML and XHTML can be understood by most browsers, but for increased accessibility to your Web pages, we recommend using XHTML when creating your Web pages.
1 Castro, E. (2003). HTML for the World Wide Web, Fifth Edition, with XHTML and CSS: Visual QuickStart Guide. 14.
Academic Technology & Creative Services 1 Spring 2006XHTML Essentials
Anatomy of an XHTML Tag
XHTML tags are pre-defined elements (specific commands) written between less than (<) and greater than (>) signs, also known as angle brackets. There is usually an opening and closing tag, with the affected text or other content lying between the two tags. These tags - and there associated attributes and values - can include formatting instructions and details about the relationship between parts of the Web page.
The following example demonstrates how to display bold text in a browser.
Opening tag
Closing tag
bold text
Attributes
Many tags have special attributes that offer a variety of options that can be applied to the affected text. Attributes are entered between the name of the tag and the final greater than symbol in the opening tag. Examples include: alignment, color, font face and size.

Tag attribute
Values
Attributes also have values. These values are the parameters by which the attributes behave. Values must be enclosed in quotation marks.

Tag attribute value
The text affected by this particular font tag will be displayed using an Arial font-face.
Nested Tags
If…