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Re: Some interesting things that show up when using a reasoner to classify schema.org

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Wed, 21 Jan 2015 09:28:48 -0800
Message-ID: <54BFE1D0.4040908@gmail.com>
To: Justin Boyan <jaboyan@google.com>, Simon Spero <sesuncedu@gmail.com>, Martin Hepp <martin.hepp@unibw.de>
CC: W3C Web Schemas Task Force <public-vocabs@w3.org>, Dan Brickley <danbri@google.com>
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It seems to me that what is needed here is local ranges, e.g., the range of
http://schema.org/itemListElement for numbered lists is a number.

peter


On 01/21/2015 08:51 AM, Justin Boyan wrote:
> I like Martin's idea. We have the same issue with
> http://schema.org/itemListElement , which can point to an arbitrary 
> Thing, but where it's important to call out the special type of ListItem
> for numbered lists.
> 
> On Wed Jan 21 2015 at 11:48:02 AM Simon Spero <sesuncedu@gmail.com 
> <mailto:sesuncedu@gmail.com>> wrote:
> 
> The issue is somewhat complicated, in that the range is due to a 
> historical name collision.
> 
> The only things which can have a purpose that is a  MedicalDevicePurpose 
> are Medical devices. The only values of purpose these devices can have
> are medical devices-
> 
> (interArgIsa1-2 purpose MedicalDevice MedicalDevicePurpose)
> 
> Simon
> 
> On Jan 21, 2015 11:21 AM, "Martin Hepp" <martin.hepp@unibw.de 
> <mailto:martin.hepp@unibw.de>> wrote:
> 
> Hi Dan, A hands-on solution would be to add two internal "annotation" 
> properties "rangeHint" and "domainHint" that allow explicitly triggering
> the display of certain schema.org <http://schema.org> types in the
> documentation.
> 
> 
> <div typeof="rdf:Property" resource="http://schema.org/purpose"> ... 
> <span>Range: <a property="http://schema.org/rangeHint" 
> href="http://schema.org/MedicalDevicePurpose">MedicalDevicePurpose</a></span>
>
> 
<span>Range: <a property="http://schema.org/rangeIncludes"
> href="http://schema.org/Thing">Thing</a></span> </div>
> 
> 
> The documentation could then list the formal range (Thing) and popular 
> types for the range (e.g. MedicalDevicePurpose)
> 
> This requires just ten lines in the RDFa and tweaking the Python code and
> Jinja templates that generate the documentation.
> 
> Martin
> 
> -------------------------------------------------------- martin hepp 
> e-business & web science research group universitaet der bundeswehr
> muenchen
> 
> e-mail:  martin.hepp@unibw.de <mailto:martin.hepp@unibw.de> phone:
> +49-(0)89-6004-4217 <tel:%2B49-%280%2989-6004-4217> fax:
> +49-(0)89-6004-4620 <tel:%2B49-%280%2989-6004-4620> www:
> http://www.unibw.de/ebusiness/ (group) http://www.heppnetz.de/
> (personal) skype:   mfhepp twitter: mfhepp
> 
> 
> 
> 
> 
> On 19 Jan 2015, at 18:18, Dan Brickley <danbri@google.com 
> <mailto:danbri@google.com>> wrote:
> 
>> Hi Simon,
>> 
>> Thanks for these! I've opened Github issues for most of them, though I 
>> take your point that there are more out there.
>> 
>> On 18 January 2015 at 17:54, Simon Spero <sesuncedu@gmail.com
> <mailto:sesuncedu@gmail.com>> wrote:
>>> 1:  The range of schema:purpose has no purpose. MedicalDevicePurpose
>>> OR Thing  = Thing
>> 
>> https://github.com/schemaorg/schemaorg/issues/233
>> 
>>> 2: The range for schema:trailer includes MovieGameSeries
>> 
>> https://github.com/schemaorg/schemaorg/issues/234
>> 
>>> 3: schema:musicBy has a much smaller domain than actor or director
>> 
>> https://github.com/schemaorg/schemaorg/issues/235
>> 
>>> 4: The range of foodEstablishment is  FoodEstablishment or Place; 
>>> but: FoodEstablishment is a subclass of LocalBusiness LocalBusiness
>>> is a subclass of Place,
>> 
>> On this one I'm more sympathetic to Martin Hepp's point. Many local 
>> businesses have foody aspects to them but it isn't always feasible to 
>> make that explicit. However I'm wary of slipping into using 
>> rangeIncludes and domainIncludes assertions purely as a UI 
>> configuration language  for the Web site.
>> 
>>> Lots, lots more.
>> 
>> Feel free to fwd or bug-file the entire horror!
>> 
>> We have some very basic unit tests expressed in SPARQL -
>> 
> https://github.com/schemaorg/schemaorg/blob/master/tests/test_graphs.py#L97
>
>  etc. which ought to catch more of these (e.g. mentions of types that
>> don't have definitions should help avoid types). This currently 
>> requires Python RDFLib for the SPARQL tests, and I have had no success 
>> making SPARQL 1.1 property paths work as advertised, which I hoped 
>> might allow some basic matching against hierarchy.
>> 
>> cheers,
>> 
>> Dan
>> 
>>> + The number of children (and adults) for which a Lodging
> reservations can be made can be a floating point number.
>> https://github.com/schemaorg/schemaorg/issues/232
>> 
> 
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Received on Wednesday, 21 January 2015 17:29:27 UTC

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