Help with xml in RCDC

I have a xml datasource in the RCDC. Below is a sample.

<findDepartments>
  <findDept Code="Department 1" Name="Department 1" />
  <findDept Code="Department 2" Name="Department 2" />
<findDepartments>

Here is the attribute reference. I have to rename Department 1 to Department 3 and that should modify the value of the users having Department 1 to Department 3.

<my:Property my:Name="Required" my:Value="{Binding Source=schema, Path=FindDepartment1.Required}"/>
<my:Property my:Name="ValuePath" my:Value="@Code"/>
<my:Property my:Name="ItemSource" my:Value="{Binding Source=findDepartment, Path=/findDepartments/*}"/>
<my:Property my:Name="SelectedValue" my:Value="{Binding Source=object, Path=FindDepartment1, Mode=TwoWay}

Thanks in advance.