How to track changes in XML?

Question

XML

Task: there is an xml with a list of objects, each object has parameters. Each object has a unique id.

It is necessary to check the xml content at specified intervals and output a log if the following changes are detected:

• an object was deleted in xml;
  
• a new object has appeared;
  
• the parameters of the object have changed.
  

Can eat any ready decision for such task?