Throughout the XML hierarchy of a CDA document, there are XML elements named time that are intended to represent a specific date/time, or a time period.

In several places in the CDA Header, the time element is intended to take on a time-stamp value (a moment in time). Refer to the article titled Moments in time in CDA for details on the XML syntax used for that.

In particular, time is used this way in the following locations in the CDA XML hierarchy:

  • Under ClinicalDocument/author for the date/time the document was written
  • Under ClinicalDocument/dataEnterer for the date/time the data was entered
  • Under ClinicalDocument/legalAuthenticator and ClinicalDocument/authenticator for the date/time the document was authenticated

Elsewhere in the CDA document (both in the CDA Header and CDA Body), the time element is intended to represent a time period. Refer to the article titled Time intervals in CDA for details on the XML syntax used for that.

In particular, time is used this way in the following locations in the CDA XML hierarchy:

  • Under ClinicalDocument/participant for the time period of participation
  • Under ClinicalDocument/documentationOf/serviceEvent/performer for the time when the service event was performed by that performer
  • Under ClinicalDocument/componentOf/encompassingEncounter/encounterParticipant for the time period of participation of the encompassing encounter
  • Under ClinicalDocument/…/entry/{clinical statement}/performer for the time when the clinical act was performed by that performer
  • Under ClinicalDocument/…/entry/{clinical statement}/participant for the time period of participation in the clinical act

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