FWIW, xpather.pl, and xpath is also not afraid of whitespace

$XPV[1] = q{
//Party[
    @id = //Relation[
                child::RelationRoleCode[
                    @tc="37"
                ]
          ]
          /@RelatedObjectID
]
/Producer/CarrierAppointment/CompanyProducerID
};
$XPV[1] = q{
//OLifE/Party[
        @id=//OLifE
            /Relation[
                RelationRoleCode[
                    @tc=8
                ]
            ]
            /@RelatedObjectID
    ]
    /Person/FirstName
};
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