I understand that this question is very basic, but I want to understand exact meaning, so please let me know.
On this site(License - FHIR v4.0.1), the FHIR license is explained as follows:
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2.20.2 FHIR License
Copyright © 2011+ HL7.
This specification (specifically the set of materials included in the fhir-spec.zip file available from the Downloads page of this specification) is produced by HL7 under the terms of HL7® Governance and Operations Manual relating to Intellectual Property (Section 16), specifically its copyright, trademark and patent provisions.
This document is licensed under Creative Commons “No Rights Reserved” (CC0 ).
HL7®, HEALTH LEVEL SEVEN®, FHIR® and the FHIR ® are trademarks owned by Health Level Seven International, registered with the United States Patent and Trademark Office.
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Does the phrase “This document” include the FHIR Specification itself?
In other words, is the FHIR Specification licensed under a CC0 license?