CODEWITHSUNDEEP
schema.org
user7898281
user7898281

Reputation:

Offers is not included as a property of thing on Schema.org

I am reading up on Schema.org to be able to add the markup to a website I am working on. However, I'm already running into something I don't understand.

In the example for Product, it shows you should have a div whose itemprop is of type offers, but in the Product definition at http://schema.org/Product, I don't see offers as a property of Product at all.

If you look at http://schema.org/offers, it says offers is a property of Thing, but I don't see offers listed as a property of Thing at http://schema.org/Thing. What am I misunderstanding here?

Upvotes: 2

Views: 288

Answers (2)

GDVS
GDVS

Reputation: 448

It's perhaps worth highlighting the distinction between "types" and "properties". The vocabulary is a hierarchical taxonomy of the tangible and intangible things around us, which it calls types. In microdata, these use the itemtype attribute.

Properties describe the attributes of and relationships between the types, and in microdata use the itemprop attribute.

So, the type Product has the property offers (it's definitely there, you must be missing it1). A product can offer various things, one of which is the possibility of having some right to own or use it, which is described by the type Offer.

The property offers is indeed a property of Thing, but Thing is at the very top of the taxonomy, i.e. everything the ontology describes is a "thing", tangible or otherwise. So Thing is then broken down into more specific types of things: 

Thing
- Intangible
-- Offer
-- Property
--- offers

So offers is a Thing like you and I are things — it's true, but we could be a lot more specific. In this case, offers is a property of the type Property, which in turn is a a more specific type of Intangible, which is a Thing.

1 Image of "offers" property under /Product:

enter image description here

Upvotes: 0

unor
unor

Reputation: 96607

Product does define the offers property. If you don’t see the offers property in the first table on that page (under the table heading "Properties from Product"), you are probably affected by a (known) bug. It typically works again when reloading the page later.

offers doesn’t have Thing as domain (but: AggregateOffer, CreativeWork, Event, MenuItem, Product, Service, Trip). If you are referring to the line "Thing > Property > offers", it doesn’t mean that the offers property is defined for/at Thing, it means that the offers property is a Thing. You can ignore that detail. What matters is the domain ("Used on these types") and the range ("Values expected to be one of these types") of a property.

Upvotes: 0

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