https://omeka.uvu.edu/files/original/1b6798083cae5aba855d802f95d885f2.JPG aa9b3d08323d3bc39d2dfae830af8e41 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Exposure meter [light meter] Source A related resource from which the described resource is derived Donna Crouch Collection Date A point or period of time associated with an event in the lifecycle of the resource circa 1965 Requires A related resource that is required by the described resource to support its function, delivery, or coherence. <a href="https://en.wikipedia.org/wiki/Light_meter">Wikipedia: Light Meter</a>