Ordinary Grade around the time that the GCE O level was established. Council for the Curriculum, Examinations Assessment (ccea the examining board and regulator in Northern Ireland. After that
For example a VideoObject or NewsArticle whose availability or relevance is time-limited, or a ClaimReview fact check whose publisher wants to indicate that it may no longer be relevant (or helpful to highlight) after some date.Publication PublicationEvent A publication event associated with the item.ScholarlyArticle, Book, TVSeries or TVEpisode may indicate their temporalCoverage in broader terms - textually or via well-known URL.
Leong (SIN members:.That it describes, either as a DateTime or as a textual string indicating a time period in ISO 8601 time interval format.