|(0020,0022)||Overlay Number||2 ||A number that identifies this Overlay.|
|(0008,0024)||Overlay Date||3 ||The date the Overlay was created.|
|(0008,0034)||Overlay Time||3 ||The time the Overlay was created.|
|(0008,1140)||Referenced Image Sequence||3 ||A Sequence which provides reference to a set of Image SOP Class/Instance pairs. Uniquely identifies the images significantly related to this overlay. One or more Items may be included in this Sequence.|
|(0008,1150)||>Referenced SOP Class UID||1C|| Uniquely identifies the referenced SOP Class. Required if Referenced Image Sequence (0008,1140) is sent.|
|(0008,1155)||>Referenced SOP Instance UID||1C|| Uniquely identifies the referenced SOP Instance. Required if Reference Image Sequence (0008,1140) is sent.