CDA Errata publication of HL7 CDA® R2 IG: C-CDA Templates for Clinical Notes R2.1 Companion Guide, Release 2 – US Realm October 11, 2021 Lynn Laakso C-CDA, Errata, STU, US Realm Learn more at http://www.hl7.org/implement/standards/product_brief.cfm?product_id=447