productIdentifierString - The string that identifies the product to the Apple App Store.
localizedDescriptionString - A description of the product.
localizedTitleString - The name of the product.
contentVersionString - A string that identifies the version of the content.
contentLengthsNumber - The total size of the content, in bytes.
priceNumber - The cost of the product in the local currency.
formattedPriceString - The locale formatted price of the product.
isDownloadableBoolean - A Boolean value that indicates whether the App Store has downloadable content for this product.
trueif at least one file has been associated with the product.