Is there a good process or library for validating changes to XML format?

[Sayth Renshaw]

Afternoon

Is there a good library or way I could use to check that the author of the XML doc I am using doesn't make small changes to structure over releases?

Not fully over this with XML but thought that XSD may be what I need, if I search "python XSD" I get a main result for PyXB and generateDS (https://pythonhosted.org/generateDS/). 

Both seem to be libraries for generating bindings to structures for parsing so maybe I am searching the wrong thing. What is the right thing to search?

Cheers

Sayth