<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">

<validators>

    <field name="host">
        <field-validator type="requiredstring">
            <message key="error.host.required"/>
        </field-validator>
    </field>

</validators>