The Forty Rules of Love

The individual or group credited with creating the main content of a product, such as a book, film, or other creative work. The value is a free‑text string representing the name(s) of the primary creator.

The binding style of a book or similar printed product, indicating how the pages are held together and presented to the reader. Common values include "Paperback", "Hardcover", "Softcover" and other variations such as "Trade Paperback" or "Pocket Book". This attribute helps customers identify the physical construction and durability of the item.

A brief statement indicating the edition or version of a product, such as "Reprint", "New Edition", or a numeric edition number like "2nd edition". It identifies which specific release of the item is being referenced.

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").

The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.

The name of the entity that publishes or distributes the product. It typically refers to a publishing house, imprint, or brand responsible for producing and releasing the item.

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.

The natural language in which a product’s content, user interface, or documentation is presented. It indicates the primary linguistic context for text, subtitles, audio tracks, and other language-dependent features.

The total count of individual pages contained in a book or printed publication. It represents the number of physical sheets that make up the product, regardless of layout or formatting.

A numeric value that represents the evaluation or quality score of a product, typically expressed as a number between 0 and 1000. The rating can be used to compare products within the same category or to indicate overall customer satisfaction.

The city, town, or region where a product was first published, released, or made available to the public. It typically includes geographic identifiers such as city names, state or province abbreviations, and country names, and may also contain postal codes or other location details.

The calendar date on which the product was first made available to the public or released for sale, expressed as a full year, month, and day (YYYY-MM-DD). This attribute can be used to filter or sort items by release period.

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

The linear measurement of a book’s spine from one edge to the other, expressed in units such as millimetres or inches. It indicates how thick the binding is and helps determine storage space, handling, and compatibility with shelving or protective covers.

The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.

The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.