# Indicator connection

The application reads the value of the connection at the data source, and updates the object’s display to reflect the state corresponding to the value.

A read connection. You can assign a tag or an expression to this connection. If you assign an expression, the application calculates the value of the expression and updates the object’s display to reflect the state corresponding to the value.

The momentaryButton, maintainedButton, multistateButton, latchedButton, multistateIndicator, listIndicator, and symbol graphic object elements' connections element contain this element.

## See also

connections and connection elements