Please, help me with mapping

Hi everybody!

help me to map this pls:

i have at the left hand

<Partner>

<PartyID schemeID="PartnerGUID" schemeAgencyID="bsq_on_sunsap03" schemeAgencySchemeAgencyID="ZZZ">476EAE930C7B1642E1000000C0A80129</PartyID>

<PartyID schemeID="PartnerID" schemeAgencyID="bsq_on_sunsap03" schemeAgencySchemeAgencyID="ZZZ">0000000617</PartyID>

</Partner>

and need at the right hand the value 0000000617 (i.e. where schemeID="PartnerID")

how to map this?