The JMX class `javax.management.modelmbean.DescriptorSupport` represents MBean metadata. It has a constructor and a method providing creation from, and export to, XML. These are unused in the JDK and have no commonly known wider usage, and are deprecated for removal. The class `javax.management.modelmbean.XMLParseException`, which is only thrown by `DescriptorSupport`, is also deprecated for removal. This will have no impact on JMX features in general.