N/xml Module
Element.getAttributeNodeNS()
Method Description: Returns an attribute node with the specified namespace URI and local name. This method is not supported on Internet Explorer.
Returns: string
Supported Script Types: All script types For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/xml Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Element.getAttributeNodeNS(options)

// Code Example 1

//Add additional code

//...

var attr = elem[0].getAttributeNodeNS({

    namespaceURI : '*'

    localName : 'lang'

});

//...

//Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_452000061035.html