@chandra_ym  I  was also searching for something like this and I found the solution. What you are looking for is to get the Value of the attribute "name" in the <parameter name="http_status_code" value="0"/>

To get the value of the attribute name use

iterate to the child nodes and using the node name 

<node-name>.getAttribute("name")); 

Use this link to understand the concept better : https://www.servicenow.com/community/developer-articles/integratenow-chapter-6-working-with-xmls/ta-...