Description
CS01:
STIX Version 2.1
Committee Specification 01
20 March 2020
https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.docx
https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html
https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.pdf