Music Library Association Best Practices for file size
Prerecording
Prerecording
Do not record the element for resources cataloged according to provider-neutral standards. For additional guidance and examples refer to MLA RDA Metadata Guidance under Format-Specific Guidance.
Otherwise: Record the element if directed by local policy.
LC/PCC practice: For subordinate materials (e.g., accompanying materials, kits, etc.), use cataloger's judgment when a detailed description of carrier characteristics is desired.
Recording
Recording
In MARC: Record as an unstructured description using field 347 subfield $c.
Recording an unstructured description
Recording a structured description
Recording an identifier
Recording an IRI
Document Date: 2025/10/29
Document: https://access.rdatoolkit.org/en-US_ala-88c16ed6-1486-3e0a-9857-e113cc347f9d