Initial disposition approved on 2022-03-17. Re-opening/re-approving to move change from Companion Guide (where it was first incorrectly categorized) to C-CDA R2.1, where it actually belongs. The current C-CDA design allows systems to 'omit' when they don't have a value. Omitting a value is not the same as support for nullFlavor – because nullFlavor allows 'OTH' and other assertions Ben has concerns wrt receivers Motion made by Brett that this is an errata and that we will remove the the binding at @code, seconded by MattS Motion carries 18/1/1