Data Binding

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 the UI is changed, the underlying data will reflect that change.
It is a term referred to in WPS, but is not specific 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 in general

One of XML data binding's strengths is the ability to un/serialize objects across programs, languages, and platforms. You can dump a time series of structured objects from a datalogger written in C (programming language) on an embedded processor, bring it across the network to process in Perl and finally visualize in Mathematica. The structure and the data remain consistent and coherent throughout the journey, and no custom formats or parsing is required. This is not unique to XML. YAML, for example, is emerging as a powerful data binding alternative to XML. JSON (which can be regarded as a subset of YAML) is often suitable for lightweight or restricted applications.