Position of the season within an ordered group of seasons.

The currency in which the monetary amount is expressed. Use standard formats: [ISO 4217 currency format](http://en.wikipedia.org/wiki/ISO_4217), e.g. "USD"; [Ticker symbol](https://en.wikipedia.org/wiki/List_of_cryptocurrencies) for cryptocurrencies, e.g. "BTC"; well known names for [Local Exchange Trading Systems](https://en.wikipedia.org/wiki/Local_exchange_trading_system) (LETS) and other currency types, e.g. "Ithaca HOUR".

The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code, the place, or the GeoShape for the geo-political region(s) for which the offer or delivery charge specification is valid. See also [ineligibleRegion](https://schema.org/ineligibleRegion).

The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code, the place, or the GeoShape for the geo-political region(s) for which the offer or delivery charge specification is not valid, e.g. a region where the transaction is not allowed. See also [eligibleRegion](https://schema.org/eligibleRegion).

Password, PIN, or access code needed for delivery (e.g. from a locker).

The payment method(s) that are accepted in general by an organization, or for some specific demand or offer.

The GTIN-12 code of the product, or the product to which the offer refers. The GTIN-12 is the 12-digit GS1 Identification Key composed of a U.P.C. Company Prefix, Item Reference, and Check Digit used to identify trade items. See [GS1 GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

The GTIN-13 code of the product, or the product to which the offer refers. This is equivalent to 13-digit ISBN codes and EAN UCC-13. Former 12-digit UPC codes can be converted into a GTIN-13 code by simply adding a preceding zero. See [GS1 GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

The GTIN-14 code of the product, or the product to which the offer refers. See [GS1 GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

The GTIN-8 code of the product, or the product to which the offer refers. This code is also known as EAN/UCC-8 or 8-digit EAN. See [GS1 GTIN Summary](http://www.gs1.org/barcodes/technical/idkeys/gtin) for more details.

The Manufacturer Part Number (MPN) of the product, or the product to which the offer refers.

The serial number or any alphanumeric identifier of a particular product. When attached to an offer, it is a shortcut for the serial number of the product included in the offer.

The Stock Keeping Unit (SKU), i.e. a merchant-specific identifier for a product or service, or the product to which the offer refers.

Nutritional information specific to the dietary plan. May include dietary recommendations on what foods to avoid, what foods to consume, and specific alterations/deviations from the USDA or other regulatory body's approved dietary guidelines.

Medical expert advice related to the plan.

Descriptive information establishing the overarching theory/philosophy of the plan. May include the rationale for the name, the population where the plan first came to prominence, etc.

Specific physiologic benefits associated to the plan.

Proprietary name given to the diet plan, typically by its originator or creator.

Specific physiologic risks associated to the diet plan.

An active ingredient, typically chemical compounds and/or biologic substances.

Descriptive information establishing a historical perspective on the supplement. May include the rationale for the name, the population where the supplement first came to prominence, etc.

A dosage form in which this drug/supplement is available, e.g. 'tablet', 'suspension', 'injection'.

The drug or supplement's legal status, including any controlled substance schedules that apply.

The specific biochemical interaction through which this drug or supplement produces its pharmacological effect.