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Các ngôn ngữ đánh dấu đầu tiên đã có SGML (Standard Generalized Markup Language), vào năm 1974. Đó là tốt, nhưng quá phức tạp. SGML được đơn giản hóa trong cả hai chức năng và cấu trúc để tạo ra HTML, một ngôn ngữ tập trung vào trình bày. Sau đó, tầm nhìn của một ngôn ngữ đánh dấu tổng quát đã được nhen nhóm, và XML (eXtensible Markup Language) được tạo ra như là một tập hợp con nghiêm ngặt (chủ yếu) của SGML. . | Glossary IxRTT An intermediate standard between 2G less than twenty kilobaud connection and 3G for CDMA carriers. Key characteristics include packet data the ability to give priority to some connections over others easy upgrade from 2G and speeds up to 150 kilobaud. Average speeds are approximately 50 kb s. 2 G Digital wireless voice communications. If data transmission is possible it is limited to less than 20 kb s. GSM CDMA iDEN PDC and TDMA are all 2G technologies. 2.5 G Digital wireless communications. Data transmission is always pack-etized rather than a dial-up connection. Data speeds average around 50 kb second and can burst up to 200 kb s so. Acronyms like GPRS CDMA EDGE and 1xRTT abound. 3 G Digital wireless communications becoming common in 2006. Acronyms like EVDO CDMA-based and W-CDMA GSM based . The Chinese have their own version TD-SCDMA. Video messaging and calls are possible with data speeds up to 2 Mb s. 3GPP 3rd Generation Partnership Project Consortium providing specifications for GSM-based 3G technologies. Of particular note are media standards like MPEG-4 for mobile. 3GPP2 Consortium providing specifications for CDMA-based 3G technologies. Of particular note are media standards like MPEG-4 for mobile. 4 G Digital wireless communications purportedly with broadband speeds. WiMAX is an example technology. adaptive design The practice of designing one application that detects device capabilities and alters rendering based on this information. One common technique is using multiple CSS files for the same web site. Can work well for simple applications whose structure does not need to change with significant changes in device capabilities. Results in a fairly good user experience but at Designing the Mobile User Experience Barbara Ballard 2007 John Wiley Sons Ltd . . . Ill GLOSSARY odds with the native user interface style of the device. See also class-based design least-common-denominator design and device targeted design. AJAX Asynchronous .
