Copyright Goodheart-Willcox Co., Inc. 542 Unit 3 Living Online A semantic tag is one in which the purpose of the tag is clear from the tag name. Some of the new semantic tags are header, footer, article, and section. These help to provide contextual information for a reader of a web page. Graphics and multimedia support have been expanded in HTML5. Now scalable vector graphic (SVG) fi les are supported so that changing the size of a vector graphic preserves fi delity to the original graphic. The canvas is a new feature that allows developers to draw images on the web page. The audio and video tags allow playing of sound and video fi les without a plug-in. Eliminating the need for plug-ins saves time for both developers and users. CSS A cascading style sheet (CSS) provides formatting information for a web page. While a CSS can be contained within an HTML fi le, in practice it is usually a separate fi le with a .css extension that is referenced by the HTML fi le. Separating the content of the HTML fi le from the formatting makes it easier to maintain an entire website. Each page can reference one CSS fi le. Any needed formatting changes can be made only once in the CSS fi le instead of in each HTML fi le. The current standard for formatting web pages is maintained by the World Wide Web Consortium (W3C). There are three levels of formatting that a CSS provides: • inline styles • internal styles • external styles FYI FYI The website www.csszengarden.com is an interesting site that shows how changing the style sheet can change the entire design of a website without modifying the content. vectorshape/Shutterstock.com Cascading style sheets allow for much flexibility when designing website pages.