Recommendation 1.1. Create the element Manifestation: extent of aggregated content
Comment: Generally agree - but where is the full text of the instructions? For suggested new elements, I expected to see the full text, even if it is as brief as note on collective agent. To fully understand how all of these proposals interrelate, the full context would be helpful.
Recommendation 1.2: Refer Format of notated music questions to Music WG.
Agree.
Recommendation 2: Update Manifestation: illustrative content to use values from RDA Aggregated Content
Agree.
Recommendation 3: RDA Aggregated Content Vocabulary Encoding Scheme
Generally agree, with the following comments:
3.2.2: Diagram Proposed definition: Aggregated content that is a geographic representation of numeric data, or of the course or results of an action or process.
I can see that limiting this to cartographic resources is the intention, since at least AACR2. However, what happens to other uses of the term "diagram" in RDA? For example, the Glossary definition of "genealogical table" includes this term. Isn't that a problem?
3.4.3. Spoken text. Proposed definition: Aggregated content that consists of a recitation of a text.
Is this always aggregated content? How does this term relate to "spoken word"? If the aggregated content is the only significant difference, this is a subtle difference in terminology that I would not expect end users to understand.
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Kathy Glennan
Director, Cataloging & Metadata Services
University of Maryland Libraries
she/her/hers
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Original Message:
Sent: Nov 18, 2025 03:35 PM
From: Karl Pettitt
Subject: Request for Comment: Proposal for Manifestation: Extent of Aggregated Content
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 aggregated content is used to record a number of the same category of expression embodied in a manifestation. The unit terms may come from a new vocabulary encoding scheme RDA Aggregated Content (with many terms derived from the current RDA Carrier Extent Unit).
Refer the issue of using terms from the vocabulary encoding scheme RDA Format of Notated Music for a possible source of values for Manifestation: extent of unitary structure to the RSC Music Working Group.
The recommendation is to move all the vocabulary from RDA Illustrative Content, except illustration to RDA Aggregated Content and modify the element Manifestation: illustrative content to be able to use applicable illustrative terms from RDA Aggregated Content.
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Karl Pettitt
Coordinator of Cataloging and Metadata Services
University of Denver Libraries
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