TXFANode Class
TXFANode stores the local name, namespace prefix and URI, text value, CDATA flag, parent, ordered attributes, namespace declarations, and owned children for one XFA element or #text node
AttrValue, HasAttr, and FindChild query the node; SetAttribute, RemoveAttribute, AddElement, AddText, SetText, RemoveChild, and ClearChildren perform ownership-safe edits and maintain text aggregation
Use TXFAPacketDOM.SelectNodes for bounded multi-node path queries and let the owning DOM serialize the result