xerces DOM API: to NS or not to NS?

[Keyur Dalal]

I need to create the following namespace aware XML document:   <D:propstat xmlns:D="DAV:">   <D:prop xmlns:R="http://foo.bar/ns">     <D:getcontentlanguage>enUS</D:getcontentlanguage>     <R:lockedby>someuser</R:lockedby>   </D:prop> </D:propstat>   If I use the DOM API to generate element nodes and append attributes, what advantages are there in using createElementNS and createAttributeNS over createElement and createAttribute?   Regards,   Keyur