Book Metadata
How descriptive book information supports discovery, review, and donation decisions, and why metadata remains broader than any single identifier.
Book metadata is the descriptive information used to identify, organize, and evaluate a book. Common fields include title, subtitle, author, publisher, publication year, language, edition, ISBN, and subject information. In library and catalog contexts, metadata may also include authority references, external identifiers, summaries, and provenance data.
Metadata matters because users rarely make decisions from identifiers alone. Libraries need enough information to judge relevance. Donors need enough information to understand what they have. Reviewers need enough information to match a physical copy to the right bibliographic record. Good metadata makes those decisions faster and less ambiguous.
No single field is sufficient on its own. ISBN is useful but incomplete. Titles can vary in spelling or translation. Author names can appear in different forms. Publication dates may be unclear in older material. That is why robust metadata workflows usually combine several fields and preserve the source of each value.
In LetBooks, metadata is also tied to the distinction between bibliographic records and physical copies. A physical copy can inherit edition-level metadata while still having its own condition, storage location, and workflow status. The separate topic page on Edition vs Physical Copy explains that model directly.
For a practical example of how ISBN-based lookup fits into a broader metadata process, see the topic ISBN, the blog article ISBN Is Not a Database, and the repository note on docs/book-metadata.md that describes the current lookup chain used in the alpha demo.