Parse XML

First I add code and External Assemblies to the .NET GLobal section of the Mapping tab:

using System;
using System.Collections.Generic;
using System.Xml;
XmlDocument demographicsXML = new XmlDocument();
XmlNodeList nodes;

External Assemblies: System.dll,,System.Xml.dll,System.Data.dll

Second I populate the global variables using a Repeat Each Row Before Operation:

using System;
using System.Collections.Generic;
using System.Xml;
void CSharpProcedure()
{
 string demographicsString = "<Demographics>"+Starfish.OriginData["DEMOGRAPHICS"].ToString()+"</Demographics>";
 demographicsXML.LoadXml(demographicsString);
 nodes = demographicsXML.DocumentElement.SelectNodes("/Demographics");
}

Third, I populate a field with data from the global variable:

object ScriptedField()
{
 string res = "";
 foreach (XmlNode node in nodes)
 {
  res = node["EXTITLE"].InnerText;
 }
 return res;
}