defineBody.js

//Define XML properties
var xmlDetail = new Properties();
xmlDetail.put("{attXmlConfigAction}",inAction);
xmlDetail.put("{attXmlConfigRecord}",inRecord);
xmlDetail.put("{attXmlConfigType}",inType);
xmlDetail.put("{attXmlConfigTtl}",inTtl);
xmlDetail.put("{attXmlConfigValue}",inValue);

//Replace placeholders in XML file with correct values
var attBody = attXmlConfigBody.getContentAsMimeAttachment().content;
for each (var key in xmlDetail.keys) {
	attBody = attBody.replace(key, xmlDetail.get(key));
}