Archive-only entries have unknown grading status. Zero points with Level 0 are pending. Positive points establish known grading, including beginner Level 0; explicit review declarations are preserved.
Strict taxonomy filters exclude unattributed records; search title text separately before deciding something is missing.
Work identity, musical sequence and completeness are unknown unless reviewed metadata is supplied. Catalog collections are existing subcategory groupings.
Historical first-publication dates are unknown. Date counts include only currently public entries with known first-publication dates.
File availability reports a public file reference, not a storage-health check.
A newer source revision exists. This response preserves the requested/captured snapshot; restart without snapshot for the latest available catalog.
materialized on first request after a committed source change; database triggers cover row writes and relationship writes