How can I represent date ranges in the DataCite DOI metadata?

The DataCite Date property can be used for different dates relevant to the work that the DOI is being assigned to.

This property accepts date ranges according to RKMS-ISO8601, which separates the start and end dates with a slash. For example, the metadata you would need to include for a date range with the dateType Valid:

 <date dateType="Valid">2025-01-01/2025-12-31</date>

More information about the DataCite Metadata Schema.