Re: ContainerHierarchy again

In programming languages, subclass relationships come with certain guarantees
such as :  a method that runs on an instance of the parent class will also run on
an instance of the subclass.

What are the equivalent guarantees on RDF subclasses?
In other words, what are the rules on behavior between a parent class and a subclass?

On 3/4/2014 3:38 PM, Kingsley Idehen wrote:
> On 3/4/14 1:16 PM, henry.story@bblfish.net wrote:
>> At the last meeting there was a resolution to move back to the previous positon
>> on container hierarchies, the position called "the minimal consensual position"
>> in
>>
>> https://www.w3.org/2012/ldp/wiki/ContainerHierarchy
>>
>> But that wiki page shows how the minimal consensual position we have currently
>> + the decisions we have previously come to lead to hierarchy
>>
>> IndirectContainer
>>    DirectContainer
>>       BasicContainer
>>
>> In RDF subclass relations DO NOT mean dependence of one subclass
>> on another. You can easily deprecate classes without subclasses or
>> superclasses without this leading to legacy issues.
>>
>> All the subclass relations mean is that you cannot have objects that are in one
>> class and not the superclass as shown by the picture
>>
>> https://www.w3.org/2012/ldp/wiki/ContainerHierarchy#LDP-BC_.3C:_LDP-DC_.3C:_LDP-IC_.3C:_LDPC
>>
>>
>> So I think it is misleading in fact to now show the classes as having no relation to each
>> other when we know they do.
>>
>> Henry
>
> Is this addressed to me or everyone else?
>
> "
> In RDF subclass relations DO NOT mean dependence of one subclass
> on another. You can easily deprecate classes without subclasses or
> superclasses without this leading to legacy issues.
> "
>
> You appear (if this is directed to me) to be assuming that I am I disagreeing with, or contradicting, the claim above?
>
> FWIW: subclasses are useful in the context of inference, when the relations in question (e.g., rdfs:subClassOf) are transitive in nature.
> -- 
>
> Regards,
>
> Kingsley Idehen 
> Founder & CEO
> OpenLink Software
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