Character Encoding

UTF-8 Character Encoding 
 OSCAL uses UTF-8 character encoding. JSON and YAML files are always UTF-8 character encoded, but XML files must include an explicit UTF-8 encoding. Other encodings are not allowed and could create unpredictable results in OSCAL tools. 
 To ensure In OSCAL XML content is processed as UTF-8 encoding, explicitly specify it on the first line of any OSCAL XML file a follows: 
 
<?xml version='1.0' encoding='UTF-8'?>