Unable to read XML value using javascript

Hello All,

I am unable to read an xml node value using javascript in Adobe live cycle designer.

XML structure

============

Below is the xml structure. I would like to read the vale of description field as selected in below image.

Javascript code

=============

var x= xfa.record.sfcPrintingData.sfcBomPrintingData.componentPrintingDataList.description.value ;

Could you please help me in this.