instantiationDate is a date associated with an instantiation.

Best practice is to use ISO 8601 or some other date/time standard if possible.

instantiationDate can be contained by the elements pbcoreInstantiation, pbcoreInstantiationDocument, and instantiationPart.

Usage: optional, repeatable.


  • dateType optional. The dateType attribute classifies by named type the date-related data of the element e.g., created, broadcast, dateAvailableStart. Used to clarify how the instantiationDate is related to the instantiation. Date Created may be the most common, but the element could also be used to describe the Date Accessioned, Date Deaccessioned, or Date Transcoded, for example. Has a PBCore controlled vocabulary (recommended).
  • source – optional. The source attribute provides the name of the authority used to declare the value of the element. Different elements will use the source attribute slightly differently. For example, identifier source (required) should be the name of the organization, institution, system or namespace that the identifier came from, such as “PBS NOLA Code” or an institutional database identifier. For other elements, this might be the name of a controlled vocabulary, namespace or authority list, such as Library of Congress Subject Headings. We recommend a consistent and human readable use.
  • ref – optional. The ref attribute is used to supply a source’s URI for the value of the element. Attribute ref can be used to point to a term in a controlled vocabulary, or a URI associated with a source.
  • version – optional. The version attribute identifies any version information about the authority or convention used to express data of this element.
  • annotationoptional. The annotation attribute includes narrative information intended to clarify the nature of data used in the element. This attribute can be used as a notes field to include any additional information about the element or associated attributes


instantiationDate contains no subelements.

Controlled vocabularies

W3C Profile of ISO 8601 Representation of dates and times
Library of Congress Extended Date/Time Format (EDTF)


Submit any issues or suggested changes for future schema iterations by creating a ticket in our Github repository.