mule - DOM to XML transformer logic -

can please explain me why dom xml transformer converts output of web service consumer xml string representation? output of web service consumer org.mule.module.ws.consumer.namespacerestorerxmlstreamreader.

according official docs:

the domtoxml transformer converts dom objects xml, xmltodom transformer converts xml strings dom objects, , domtooutputhandler transformer converts dom outputhandler serialization.

they refer w3c dom object, knowledge html dom used in web browsers?

thanks