Speaking of namespaces :) xpather.pl shows you don't need to registerNs 
/*[ local-name() = "root"
    and position() = 1
  ]

/*[ local-name() = "Volume"
    and @VolumeCategory = "cuft"
    and @MeasurementCategory = "Real"
    and contains(string(), "2.2")
  ]

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In reply to Re: Finding node with attribute XML::LibXML by Anonymous Monk
in thread Finding node with attribute XML::LibXML by jjap

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