Product, and the ratings that never ship
A full Product and Offer implementation. The authored markup carries invented reviews; the output does not.
The Bracket Field Notebook does not exist. It is not for sale, it has never been manufactured, and the price below buys nothing. It is written out in full so Product markup can be tested against a page that reads like a real product page.
The notebook
A5, 192 pages, 100gsm cream paper, sewn so it opens flat. Dot grid at 5mm. Card cover, no elastic, no pocket, no ribbon. The back page carries a printed conversion table nobody asked for.
Why this specimen is the important one
Product is where fabricated structured data is most common and most consequential. A star rating in a search result is a claim about what other people thought, and a page that invents one is lying to everybody downstream of it: the search engine, the assistant summarising it, and the person deciding whether to buy.
The authored markup for this specimen contains an aggregateRating of 4.8 from 1,203 reviews and a named review with a 5-star rating. None of it is in the output. Nobody has ever bought this notebook, so there is nothing to average. Open the Authored tab in the panel and you can see exactly which lines were cut.
What is left
Everything that is true: the name, the description, the brand, the SKU, the physical properties, and an Offer with a price and a currency and an availability. A Product marked up this way is missing its stars. That is the correct outcome, and it is worth knowing what it costs.