Below is the abstract for this proposal. Please see the attached for the full proposal and comment no later than Monday, December, 22, 2025.
Abstract
As a subelement of Manifestation: extent of manifestation, the proposed element Manifestation: extent of unit and its subtypes are used to record quantifications and measurements of aspects of a manifestation that are available to hold content. These measurements include components or characteristics that do not embody content.
For the following existing elements, the proposal is to establish them as subtypes of Manifestation: extent of unit. Any existing subtype hierarchy for these elements will remain in place when they become subtypes of Manifestation: extent of unit. This creates the flexibility for these elements to be used to contribute values to Manifestation: extent of manifestation when using a string encoding scheme to construct a new value for extent of manifestation.
Manifestation: bibliographic format
Manifestation: dimensions
Manifestation: number of recording tracks [current label: tape configuration]
The term leaf and related and derivative terms will need to have definitions clarified to indicate that these terms are for units that are available to hold content and include units that do not embody content. The related terms are: panel, folded leaf, and updating loose-leaf.
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Karl Pettitt
Coordinator of Cataloging and Metadata Services
University of Denver Libraries
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