The National Archives Catalog

Element Number

Mandatory Repeatable Data Type Authority Level Available A/V Only Public Element
No No Numeric (2) None Item Yes Yes



The number assigned to an individual physical component that makes up a reel, tape, or disc. Commonly used when a film reel is made up of separate sound and picture elements, or when a film reel is composed of A and B rolls. For example, a film reel may be composed of an image reel and a soundtrack reel. The image reel could be designated element number 1, and the soundtrack reel could be designated element number 2.


Purpose: Indicates the sequence of the media occurrence in relation to the other media occurrences that make up the physical occurrence.


Relationship: This element is dependent on Media Type. Each media occurrence of the archival materials must have a media type specified to create Element Number.


Guidance: Enter the element number.









Previous Element
Next Element
Table of Contents
Lifecycle Data Requirements Guide