In XML, every namespace must be defined in order to be used. If your XML data do not contain the definitions of the namesepaces, they are not well-formed XML and cannot be parsed by libxml (nor XML::LibXML).

Are you sure your XML documents do not contain something like the following? 

xmlns:dc="http://purl.org/dc/elements/1.1"

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In reply to Re: LibXML Namespace issue by choroba
in thread LibXML Namespace issue by ohm.kazhbu

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