Re: why Vehicle subClassOf Product ? (also: Commercial, Economic)

Two more comments:

1. Vehicle has been a subtype of Product for quite long, maybe even since the beginning of schema.org.

2. Since "Product" is a role, putting a type below this type which mainly exists in this role is arguably acceptable, even though it violates the OntoClean axioms (being a Product is a non-rigid property, while being a Car is typically a rigid one, and OntoClean says that a rigid property should not be a subclass of a non-rigid one, if I am not mistaken).

As for immediate action: As long as the number of such types in schema.org is small, I think we can leave it as it stands for the moment. We should avoid growing this branch extensively, though.


Martin
--------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

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On 26 Mar 2015, at 14:35, ☮ elf Pavlik ☮ <perpetual-tripper@wwelves.org> wrote:

> Hello,
> 
> As I understand Product acts as Class for adding e-commerce aspect to
> other Things. Most likely to use it with "@type": ["Book", "Product"] or
> additionalType when used in microdata.
> 
> I don't understand why Vehicle landed as subClassOf Product? I also
> don't understand which other things may end up subclassing Product in
> the future and which will for example subclass CreativeWork or Place.
> 
> IMO Vehicle, just as Place could directly subclass Thing. Or we could
> also add Tangible class to deal in a future with with Device etc. (e.g.
> http://schema.org/MedicalDevice)
> 
> It reminds me about my question long time ago about POI (Point Of
> Interest). Which also doesn't make that much sense in class hierarchy
> but could similar as Product serve as a class to use in addition to
> other classes.
> 
> I haven't worked with ruby programming language for quite some time, but
> in some ways I see similarity to Class vs. Module (besides many other
> differences from Object Oriented Programming, single parent doesn't
> apply here as well)
> This answer has relevant example which happens to use a Vehicle
> http://stackoverflow.com/questions/1282864/ruby-inheritance-vs-mixins/1282895#1282895
> 
> In a way Product sounds to me as something more in direction of
> 'Commercial' or broader 'Economic'.
> 
> Thoughts?
>

Received on Thursday, 26 March 2015 14:34:22 UTC