New Media Glossary

XHTML
Extensible HyperText Markup Language is an enhanced version of HTML that incorporates elements of the XML programming code. This allows programmers to gain XML customization options without having to entirely recode currently functioning HTML pages, and to ensure that these enhanced pages remain recognizable to older HTML code.

XML
Extensible Markup Language is a programming language that allows for greater customization in how to deliver, interpret, present and format data for online use than does HTML—which has a fixed set of options, attributes and code tags.

XSL
Extensible Scripting Language is a style sheet language that essentially applies style templates to XML code. As such, it works much like Cascading Style Sheets (CSS) do to affect HTML code, but with added options—such as the ability to dictate printing directives.

Yahoo
Company whose innovative online interfaces helped define the way that people navigate the internet today. Yahoo provided one of the web’s first search engines, and continues to provide its predominant content directory—for which human editors select websites worthy of inclusion in thematically categorized and searchable lists.

yield
The percentage of ad impressions that inspire online visitors to click for additional information. Also called click-through rate.

ZUI
A Zooming User Interface is an enhanced graphical user interface that allows users to visually drill down through navigation options. Repeated clicking can thus move a satellite map viewer from a country view to a street view, and can move an electronic program guide browser from a tier, to a member channel, to its program listings, to a program synoposis, to watching the show itself.

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