Series 60 SDK 2.1 for Symbian OS enables C++ appcation development for the Series 60 Developer Platform 2.0 devices sch as the Nokia 6620 and Nokia 7610, which are based the Series 60 2. software. New in Series 60 2.1 is support for the Presence Open API and Bluetooth notifier. The SDK includes all key functionality needed for application development (documentation, API reference, add-on tools, emulator, and target compiler) when used in conjunction with an IDE. This version supports Borland C++BuilderX, CodeWarrior Development Studio for Symbian OS v2.5, Microsoft Visual C++ .NET and Microsoft Visual C++ 6.0. <http://www.w3.org/2001/XMLSchema#string>