Liar and Spy

The minimum and maximum ages, expressed in years, for which a product is intended or suitable. The value can be a single number (e.g., "9"), a numeric range (e.g., "5-8"), or an open‑ended interval such as "12+" indicating only the lower bound.

The nation in which a book or other published work was first released to the public. It indicates the country where the publication event took place, regardless of the author’s nationality or the publisher’s location.

The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render the visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.

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.

A list of the natural languages in which a product is available or supported.

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

The group of people for whom the product is intended, such as children, adults, professionals, students, or specific educational levels. It helps consumers identify whether a product meets their needs and preferences.