Data binding is the process that establishes a connection between the application UI (User Interface) and business logic. If the settings and notifications are correctly set the data reflects changes when made. It can also mean that when data is changed, the underlying data will reflect that change.
It is a term referred to in WPS, but is not specifically to programming language or platform, though it is often most often used with Java and XML. As an example, a change in a
TextBox element could modify the underlying data value.
Data binding frameworks and tools
- LiveBindings 
- DSharp 3rd party Data Binding tool 
- OpenWire Visual Live Binding - 3rd party Visual Data Binding tool