Never Split the Difference: Negotiating As If Your Life Depended On It

Indicates the physical or digital format in which a product is presented, such as "Hardback", "Paperback", "DVD", "Blu‑ray", "Vinyl", or other media types. The value may contain multiple comma‑separated items to represent combined attributes (e.g., "Hardback, Illustrated").

A unique identifier assigned to books and other printed publications, typically consisting of 10 or 13 digits. It may include hyphens for readability but is treated as a string value. The ISBN uniquely identifies a specific edition of a title across the publishing industry.

A list of natural languages in which the product’s content, user interface, subtitles, or documentation is available. Each language represents a distinct linguistic context that users can select for reading, listening, or viewing.

The official title of the product as it appears in its source material, without any translations or modifications. It is used to display the primary name on detail pages and for search purposes.

The overall size of a product expressed as three numeric values—height, width and depth—with an appropriate length unit (e.g., cm, in). It allows customers to assess fit, shipping requirements and compare physical sizes across items.

The name of the entity that publishes or distributes the product, such as a book, magazine, or other media item.