Object
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  +--xp.events.Event
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        +--xp.events.ItemEvent

An event related to a data item. The event has an item property which is the item the event is related to . The event can be one of "newItem". newItem: Broadcast when a new transfer object is constructed by the ListDataSource.createItem() method, but before it is added to the collection. A listener for this event can make modifications to the item before it is added to the collection.
calcFields: Broadcast when calculated fields should be updated. Generated when values of calculated fields for the current item in the collection need to be determined. A calculated field is one whose Kind property is set to Calculated on the Schema tab of the Component inspector. The calcFields event listener that you create should perform the required calculation and set the value for the calculated field. This event is also called when the value of a noncalculated field is updated.
beforeApplyUpdates: Broadcast by the DBMSResolver component to allow u to make custom modifications to the XML of the updatePacket property before it is bound to the connector. The item is the XML object about to be applied. This event handler provides a way for you to make custom modifications to the XML before sending the updated data to a connector.