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Re: Missing subClassOf?

From: Alex Milowski <alex@milowski.com>
Date: Wed, 28 Aug 2013 08:32:28 -0700
Message-ID: <CABp3FNLKAfH8eEdjWhLtVD0ZCMb_5UuNFZfmKKk0iTr9T1wTbQ@mail.gmail.com>
To: "public-vocabs@w3.org" <public-vocabs@w3.org>
Yet, for example, the definition of http://schema.org/domainIncludes says
the expected value is schema:Class when in the RDFa/RDFS schema use it is
an instance of rdfs:Class.

It doesn't make a lot of sense to define domainIncludes/rangeIncludes if
they're only to be used within the context of RDFa where the respective
values are not as they say.  Yet, if they are to be used within Microdata,
then you need subClassOf.

This just points out the sad state of "schema" or "constraint" languages
for these kinds of things.  If schema.org needs to define
domainIncludes/rangeIncludes (which it does), shouldn't they be defined
just within the context of the schema syntax and not for the type hierarchy
described by that syntax?


On Wed, Aug 28, 2013 at 7:33 AM, Dan Brickley <danbri@danbri.org> wrote:

> On 28 August 2013 15:29, Alex Milowski <alex@milowski.com> wrote:
>
>> Why does http://schema.org/Class and http://schema.org/Property exist if
>> the RDFa version uses rdfs:Class and rdfs:Property?
>>
>
> They're not intended for widespread use, but they help us define
> rangeIncludes and domainIncludes within our existing documentation
> framework. The docs should probably say that somewhere - I think I
> mentioned same last week (here or in G+).
>
> Dan
>
>
>>
>> On Wed, Aug 28, 2013 at 6:35 AM, Dan Brickley <danbri@danbri.org> wrote:
>>
>>> On 27 August 2013 22:41, Alex Milowski <alex@milowski.com> wrote:
>>>
>>>> I've been looking at [1] and [2] and the subClassOf property
>>>> definition [3] is missing .
>>>>
>>>> [1] http://www.schema.org/docs/full_md.html
>>>> [2] http://www.schema.org/Class
>>>> [3] http://www.schema.org/subclassOf
>>>>
>>>
>>> I think we should mark [1] as an early (unsupported etc.) experiment in
>>> using Microdata to show schema information. The RDFa version (linked from
>>> http://schema.org/docs/datamodel.html) is more mature and approaching
>>> stability. BTW each page for types, properties and enumerations also
>>> contains a little RDFa/RDFS description of that term too.
>>>
>>> Dan
>>>
>>>
>>>>  <http://www.schema.org/subclassOf>--
>>>> --Alex Milowski
>>>> "The excellence of grammar as a guide is proportional to the paucity of
>>>> the
>>>> inflexions, i.e. to the degree of analysis effected by the language
>>>> considered."
>>>>
>>>> Bertrand Russell in a footnote of Principles of Mathematics
>>>>
>>>
>>>
>>
>>
>> --
>> --Alex Milowski
>> "The excellence of grammar as a guide is proportional to the paucity of
>> the
>> inflexions, i.e. to the degree of analysis effected by the language
>> considered."
>>
>> Bertrand Russell in a footnote of Principles of Mathematics
>>
>
>


-- 
--Alex Milowski
"The excellence of grammar as a guide is proportional to the paucity of the
inflexions, i.e. to the degree of analysis effected by the language
considered."

Bertrand Russell in a footnote of Principles of Mathematics
Received on Wednesday, 28 August 2013 15:32:55 UTC

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