XMLNSC attributes

Iam getting the below message from an application

        field:CHARACTER:abcd
                mv:CHARACTER:1
                name:CHARACTER:NAME
                sv:CHARACTER:1
        field:CHARACTER:aaaaa
                mv:CHARACTER:1
                name:CHARACTER:Address
                sv:CHARACTER:1
        field:CHARACTER:123456
                mv:CHARACTER:1
                name:CHARACTER:Phone
                sv:CHARACTER:1

and i am parsing the above into XML and the code is: SET OutputRoot.XML.EE_EAI_MESSAGE.Response.NAME = InputRoot.XMLNSC.Ns1:TNS.Ns1:Response.Ns1:Processed.Ns1:field[1]; SET OutputRoot.XML.EE_EAI_MESSAGE.Response.ADDRESS = InputRoot.XMLNSC.Ns1:TNS.Ns1:Response.Ns1:Processed.Ns1:field[2]; SET OutputRoot.XML.EE_EAI_MESSAGE.Response.MOBILE = InputRoot.XMLNSC.Ns1:TNS.Ns1:Response.Ns1:Processed.Ns1:field[3];

till now everything is fine and this code is working fine. Now i got an issue i.e the Application never includes an empty field in response message so the application is sending the message as

        field:CHARACTER:abcd
                mv:CHARACTER:1
                name:CHARACTER:NAME
                sv:CHARACTER:1
        field:CHARACTER:123456
                mv:CHARACTER:1
                name:CHARACTER:Phone
                sv:CHARACTER:1

the Address field is missing in the above input message, according to my esql code the data is miss mapping due to field index. So i need to map the fields by checking the tagnames in input message, but i am not able to do...I am very thankful if anyone help on this.