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Re: URIs for properties at schema.org

From: Martin Hepp <martin.hepp@ebusiness-unibw.org>
Date: Thu, 13 Oct 2011 00:57:08 +0200
Cc: public-vocabs@w3.org
Message-Id: <8B5BFB31-BB93-45F7-A193-98D8D257BC5F@ebusiness-unibw.org>
To: Bob Ferris <zazi@smiy.org>
FYI: GoodRelations will clearly define in its next service update that the URIs of properties should be formed by attaching the local name of the property to the base URI of the vocabulary, not to the URI of the itemtype that gives the context.

I also think that this is the most useful pattern for most cases, but if that cannot be written in the standard, Microdata parsers must simply offer this as a heuristic.


On Oct 12, 2011, at 10:44 AM, Bob Ferris wrote:

> Hi,
> 
> On 10/12/2011 9:45 AM, Bernard Vatant wrote:
>> Thanks for the pointer to any23.org <http://any23.org>
>> 
>> An issue I clearly see with URIs such as http://schema.org/Person/name
>> is that some properties are used by more than one class. So we'll have
>> for example http://schema.org/Movie/duration and
>> http://schema.org/Event/duration potentially misleading to the idea that
>> they are different properties with specific domains, although the
>> definition found for "duration" is exactly the same at both
>> http://schema.org/Movie and http://schema.org/Event : "The duration of
>> the item (movie, audio recording, event, etc.) in ISO 8601 date format
>> <http://en.wikipedia.org/wiki/ISO_8601>." So it's another argument for
>> having this definition clearly published at a single place, under
>> http://schema.org/duration - with expected range
>> http://www.schema.org/Duration. (which BTW would lead to the side issue
>> of having a property and its range just differing by one character case,
>> not a good practice in my opinion).
> 
> +1 for excluding the class domains in the URIs of multiple classes spanning properties, i.e., a name is a name is a name. A human user and also a machine will get the relation (specific meaning) of name via its context, i.e., the types of that resource, e.g., schemaorg:Person => a person's name etc.
> 
> Cheers,
> 
> 
> Bo
> 
> 
> PS: otherwise we would probably end up with something the like the Freebase vocabulary ;)
> 
> 
Received on Wednesday, 12 October 2011 22:57:35 GMT

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