Uses the XCCDF schema validate a XCCDF XML file written for XCCDF version 1.2
The xccdf and oval files were retrieved from https://gist.github.com/abergmann/13e1ef5c0ad06a640f90aa8a9897644e
The xccdf schemas can be found here: https://csrc.nist.gov/projects/security-content-automation-protocol/specifications/xccdf