Short for Synchronization Markup Language, SyncML is a platform-independent data synchronization standard. It is used to synchronize data, such as contacts, to-do lists, schedules and more between different devices (including phones, handhelds, PCs) or even services, such as Web sites. SyncML provides an XML-based standard format for this data that all SyncML-compatible devices can understand. It can work over various types of connections, including Wireless Internet, Bluetooth, and infrared.