Re: schema:offers domain and range inverted?

schema:offers has been in schema.org, afaik, since the very first release,
and other than in GoodRelations, it was used to link from a product to its
offer or offers. In GoodRelations, gr:offers had a different meaning and
linked from an agent to an offer.

If you want to link from the offer to the items included in the offer,
there is schema:itemOffered for a single product (same as gr:includes) and
schema:includesObject for a bundle. CreativeWork
<http://schema.org/CreativeWork> and Event <http://schema.org/Event> are
just two types that are actually specializations of schema:Product, but
since we do not want to put every type that could also be used in offers
below schema:Product, they are listed explicitly in the range/domain.

Hope that helps.

Martin

PS: The reason why the Internet Archive does not help is that the
property-specific pages were introduced quite some time after the first
release of schema.org.



On Sun, Jul 19, 2015 at 4:56 PM, Jindřich Mynarz <mynarzjindrich@gmail.com>
wrote:

> Hi,
>
> the domain of the <http://schema.org/offers> property is defined as
> including schema:AggregateOffer, schema:CreativeWork, schema:Event, and
> schema:Product; while its range is schema:Offer. Given the local name
> "offers" (and not, let's say "offeredBy"), shouldn't the domain and the
> range of this property be inverted? For example,
> schema:Offer=>schema:offers=>schema:Product looks more natural than the
> current schema:Product=>schema:offers=>schema:Offer.
>
> I suspect there's a simple reason, why schema:offers is defined (or
> labelled) this way. I tried finding the reason by using Schema.org's commit
> history, but I discovered the property was always (since the project moved
> to Gihub) defined this way (
> https://github.com/schemaorg/schemaorg/blob/4bf8dda0a6802850ef6e5ff34061fe0ee4584317/schema.rdfa#L7010-L7014).
> Similarly, the Internet Archive also doesn't reveal anything from the
> history of this property (
> https://web.archive.org/web/20130515000000*/http://schema.org/offers).
>
> Can someone explain why schema:offers is defined and labelled in this way?
>
> Thanks,
>
> Jindřich
>
> --
> Jindřich Mynarz
> http://mynarz.net/#jindrich
>



-- 
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martin hepp, http://www.heppnetz.de