This specification defines XHTML 1.0, a reformulation of HTML 4 as an XML 1.0 application, and three DTDs corresponding to the ones defined by HTML 4. The semantics of the elements and their attributes are defined in the W3C Recommendation for HTML 4. These semantics provide the foundation for future extensibility of XHTML. Compatibility with existing HTML user agents is possible by following a small set of guidelines

XML 1.0 (3rd Edition)

This specification, together with associated standards (Unicode and ISO/IEC 10646 for characters, Internet RFC 1766 for language identification tags, ISO 639 for language name codes, and ISO 3166 for country name codes), provides all the information necessary to understand XML Version 1.0 and construct computer programs to process it.

CSS2 Specification

This specification defines Cascading Style Sheets, level 2 (CSS2). CSS2 is a style sheet language that allows authors and users to attach style (e.g., fonts, spacing, and aural cues) to structured documents (e.g., HTML documents and XML applications). By separating the presentation style of documents from the content of documents, CSS2 simplifies Web authoring and site maintenance.

CSS

Cascading Style Sheets or CSS, as it is informally known, is the premier developer’s tool for designing high-end websites. CSS language works with HTML to define the contents of a website with ease and flexibility in a straightforward process. Adjusting layouts and style sheets are manipulated with CSS. CSS saves programmer / designer’s time and energy in adjusting changes to the development of a website by placing the code directly into the HTML document head, and/or in a separate sheet for simple website alteration.

CSS

Cascading Style Sheets or CSS, as it is informally known, is the premier developer’s tool for designing high-end websites. CSS language works with HTML to define the contents of a website with ease and flexibility in a straightforward process. Adjusting layouts and style sheets are manipulated with CSS. CSS saves programmer / designer’s time and energy in adjusting changes to the development of a website by placing the code directly into the HTML document head, and/or in a separate sheet for simple website alteration.

XML

A dialect of SGML (Standard Generalized Markup Language), XML (Extensible Markup Language), is not a programming language but a set of rules that structure data in a representational manner. XML rules are standard, leading the programmer to create documents that are automatically processed and generated for the World Wide Web. The breakdown of XML is as follows: Extensible, meaning user-defined tags, Markup, a collection of tags and XML Tags identifying data content.

CSS3

Cascading Style Sheets (CSS) is a style sheet format, endorsed by the World Wide Web Consortium (W3C) that works with HTML documents using simple syntax and various style properties denoted by English language keywords.

XML

XML Tutorial

HTML Tutorial

How can you learn the language of the Web so fast? By example. This quide breaks HTML down into simple steps that anyone can learn quickly, and shows you exactly how to take each step. Every HTML example is pictured right above the Web page it will produce. You see it done, you read a brief plain-English explanation of how it works, and you immediately do the same thing with your own page. Ten minutes later,you're on to the next step.

Complete CSS (Cascading Style Sheets) Guide

Welcome to the Complete CSS Guide, a reference to every aspect of cascading style sheets. If you need help learning CSS or if you're looking for info about selectors, properties and all the other aspects of cascading style sheets, this is the place.