Associates a coded value with a defined list of descriptive values and automatically converts the coded value to the descriptive value.
The property can be defined as an SQL statement or as a JSON encoded array
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<Columns>
<DNL:GridColumn ColumnExpression="productid" Lookup="select id, productname from products"/>
<DNL:GridColumn ColumnExpression="country" Lookup="select distinct country from customers"/>
<DNL:GridColumn ColumnExpression="status" Lookup="['Open','Closed']"/>
<DNL:GridColumn ColumnExpression="discontinued" Lookup="[['Y','Yes'],['N','No']]"/>
</Columns>
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