How could I make work the same sample is provided by IgniteUI about XML Binding in Hierarchicalgrid but...

with a diferent XML like this:

var xmlDoc = '<OrgChart Name="Lista de Empleados">' +
'<Employee Name="Gustavo Achong" Age="42" Email="gachong@adventureworks.com">' +
'<NewEmployee Name="Kim Abercrombie" Age="33" Email="kabercrombie@adventureworks.com" clave="1" />' +
'<NewEmployee Name="Lawrence Tapley" Age="52" Email="ltapley@adventureworks.com" clave="2" />' +
'</Employee>' +
'<Employee Name="Catherine Abel" Age="27" Email="cabel@adventureworks.com">' +
'<NewEmployee Name="Kristen Anderson" Age="30" Email="kanderson@adventureworks.com" clave="3"/>' +
'<NewEmployee Name="Richard Lee" Age="25" Email="rlee@adventureworks.com" clave="4" />' +
'<NewEmployee Name="Victoria Gramley" Age="23" Email="vgramley@adventureworks.com" clave="5" />' +
'</Employee>' +
'<Employee Name="Adrienne Mauro" Age="27" Email="amauro@adventureworks.com">' +
'<NewEmployee Name="Christopher Chadwick" Age="37" Email="cchadwick@adventureworks.com" clave="6"/>' +
'</Employee>' +
'</OrgChart>';

I´ve change lots of things but I can´t get with the solution.

I have to know what instruction I need to use just to tell the DataSchema that NewEmployee is the second level.