Replace Element using Intsaved query

Content

I have two questions to ask;

1.       In the below highlighted reference is used to match the invoice to shipment, this field may have shipment id or order id, I case of order id I need to pull the shipment id and replace this xml element value with shipment id. Hope this can be done using integration saved query. But don’t know how to define saved query in xml.

                                         <InvoiceGid>

                                                <Gid>

                                                       <DomainName>DOMAIN</DomainName>

                                                       <Xid>20190808-S-00007-001</Xid>

                                                </Gid>

                                         </InvoiceGid>

                                         <TransactionCode>IU</TransactionCode>

                                         <InvoiceNum>20190820-PARENT-0003</InvoiceNum>

                                         <InvoiceDate>

                                                <GLogDate>20190820100000</GLogDate>

                                                <TZId>CET</TZId>

                                         </InvoiceDate>

                                         <InvoiceRefnum>

                                                <InvoiceRefnumQualifierGid>

                                                       <Gid>

                                                              <DomainName>DOMAIN</DomainName>