Namespace Javax.Xml.Namespace Classes NamespaceContext https://docs.oracle.com/en/java/javase/11/docs/api/java.xml/javax/xml/namespace/NamespaceContext.html QName https://docs.oracle.com/en/java/javase/11/docs/api/java.xml/javax/xml/namespace/QName.html Interfaces INamespaceContext .NET interface for TO BE DEFINED FROM USER