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1. While importing the xml nodes if you do not want repeat the nodes means we have to write the small code to remove those nodes.
IXMLDOMSelection nodes = (IXMLDOMSelection)thisXDcoument.DOM.selectNodes("XPath of repeating node");
nodes.removeAll();
2. If you want to copy the repeating fields to another dom, If the schema structure is same then we can replace with node list parent node to another parent node.
3. If we want to get node list of the number of fields in main dom then we can easily get how many fields are there in that node using below code,
int numberOfFields = nodeList.Count;
Note: Above code in C#.