Struts - custom validation messages

in validation.xml

<field property="increasedIdleRotation"
depends="integer,intRange">
<msg
name="intRange"
key="error.EPBMeasure.idleRotation.rangemsg" />
<var>
<var-name>min</var-name>
<var-value>2000</var-value>
</var>
<var>
<var-name>max</var-name>
<var-value>9999</var-value>
</var>
</field>

add element msg
name must correspond to the validator, e.g. intRange
key is the key in application.properties resource file containing the localizated error message when the corresponding validation fails