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What are style sheets?

Style sheets describe how documents are presented on screens, in print, or perhaps how they are pronounced. W3C has actively promoted the use of style sheets on the Web since the Consortium was founded in 1994. The Style Activity has produced several W3C Recommendations (CSS1, CSS2, XPath, XSLT). CSS especially is widely implemented in browsers. By attaching style sheets to structured documents on the Web (e.g. HTML), authors and readers can influence the presentation of documents without sacrificing device-independence or adding new HTML

History of CSS

Style sheets have existed in one form or another since the beginnings of SGML in the 1970s. Cascading Style Sheets were developed as a means for creating a consistent approach to providing style information for web documents. As HTML grew, it came to encompass a wider variety of stylistic capabilities to meet the demands of web developers. This evolution gave the designer more control over site appearance but at the cost of HTML becoming more complex to write and maintain. Variations in web browser implementations made consistent site appearance

CSS2 Specification

Abstract 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. CSS2 builds on CSS1 (see [CSS1]) and, with very few exceptions, all valid CSS1 style sheets are valid CSS2 style sheets. CSS2 supports media-specific style

CSS3 Basic User Interface Module

Abstract This section is informative. CSS (Cascading Style Sheets) is a language for describing the rendering of HTML and XML documents on screen, on paper, in speech, etc. It uses various selectors, properties and values to style basic user interface elements in a document. This specification describes those user interface related selectors, properties and values that are proposed for CSS level 3 to style HTML and XML (including XHTML and XForms). It includes and extends user interface related features from the selectors, properties and values of

CSS3 Color Module

Abstract CSS (Cascading Style Sheets) is a language for describing the rendering of HTML and XML documents on screen, on paper, in speech, etc. To color elements in a document, it uses color related properties and respective values. This specification describes the properties and values that are proposed for CSS level 3. It includes and extends them from properties and values of CSS level 2. Status of This Document This specification is one of the "modules" for the upcoming CSS level 3 (CSS3) specification. It not only describes the color related

CSS3 Generated and Replaced Content Module

Abstract This CSS3 Module describes how to insert and move content around a document, in order to create footnotes, endnotes, section notes. Inserted content can also introduce counters and strings, which can be used for running headers and footers, section numbering, and lists. Finally, techniques for declaring replaced images, as well as scaling and cropping them using CSS, are described. Status of this document This is a working draft of a CSS level 3 module. It aspires to eventually become a CSS3 Recommendation. This document is written in

CSS3 module: Presentation Levels

Abstract Presentation levels are integer values attached to elements in a document. Elements that are below, at, or above a certain threshold can be styled differently. This feature has two compelling use cases. First, slide presentations with transition effects can be described. For example, list items can be progressively revealed by sliding in from the side. Second, outline views of documents, where only the headings to a certain level are visible, can be generated. Status of This Document This section describes the status of this document at

CSS3 Ruby Module

Abstract "Ruby" are short runs of text alongside the base text, typically used in East Asian documents to indicate pronunciation or to provide a short annotation. This document proposes a set of CSS properties associated with the 'Ruby' elements. They can be used in combination with the Ruby elements of HTML [RUBY]. Status of This Document This specification is one of the "modules" for the upcoming CSS level 3 (CSS3) specification. It has been developed by the CSS Working Group which is part of the Style activity (see summary). It contains


 
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