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A QDM attribute provides specific detail about a QDM datatype.

Performance/Reporting Period
QDM Datatype (QDM Version 5.6):
When the order indicates the first immunization administration should occur. active dateTime is most often used to specify immunizations for which administration is intended at a specific time in the future. If active dateTime is not specified, it defaults to the author dateTime (when signed).
Last Updated: Jul 15, 2022