W3C home > Mailing lists > Public > public-schemaorg@w3.org > May 2018

Re: Historical events

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Wed, 30 May 2018 12:51:33 -0700
To: public-schemaorg@w3.org
Message-ID: <aaaf9c93-908d-47c8-1836-e59b8ec9eacb@gmail.com>
Right, I also worry about stretching schema.org/Event to cover any perdurant,
or even things like WWII whose location is certainly not "certain", or even
anything that is not the kind of event that has performers and attendees.  
It's not that there is very little to say what a schema.org/Event is not but
that there is a lot of information at http://schema.org/Event that is specific
to the "such as" part of the description there, indicating to me that
schema.org/Event should not be stretched (much) beyond these kinds of events.


On 05/30/2018 10:25 AM, Roger Rohrbach wrote:
> Thad,
>  The Event class’ description is “an event happening at a certain time and
> location, such as a concert, lecture or festival.”  Its properties—composer,
> performer, organizer, audience, doorTime, workPerformed, review etc.—clearly
> adhere to this narrow definition.  You’re suggesting that we shoehorn World
> War II battles and the Bronze Age into this schema, and quell any uneasiness
> thus induced by referencing an external vocabulary.  I will admit that this
> is possible; to my mind, it is undesirable.  Were the Event type truly a
> “general type” capable of serving as the superclass for these two different
> semantic elements, I’d feel differently.
> To use an analogy, it’s as if  schema.org <http://schema.org> provided
> Funeral, but not Ceremony, and you told me “just use Funeral to represent
> Wedding, and reference  https://www.wikidata.org/wiki/Q49836 as the
> additionalType.” 
> I accept the premise that this is not a universal ontology.  But what
> classes there are, ought to retain their semantics.  The Bronze Age is not
> a-kind-of concert, lecture or festival.  I can’t see how your approach would
> result in truly machine-readable content.
> respectfully,
> Roger
>> On May 29, 2018, at 2:13 PM, Thad Guidry <thadguidry@gmail.com
>> <mailto:thadguidry@gmail.com>> wrote:
>> Allison and Roger... see examples below.  Yes, you can still use Event. 
>> When you don't have a startDate or endDate, then just leave them excluded. 
>> The use of additionalType and referencing other ontologies or Wikidata is
>> quite useful and a generally accepted best practice when you need to easily
>> subtype things that Schema.org <http://Schema.org> has only general types
>> available.
>> {
>>   "@context": "http://schema.org <http://schema.org/>",
>>   "@type": "Event",
>>   "sameAs": "https://www.wikidata.org/wiki/Q327052",
>>   "additionalType": "https://www.wikidata.org/wiki/Q15815670",
>>   "name": "Battle of Aachen",
>>   "startDate": "2 October 1944",
>>   "description": "major conflict during World War II",
>>   "endDate": "21 October 1944"
>> }
>> {
>>   "@context": "http://schema.org <http://schema.org/>",
>>   "@type": "Event",
>>   "sameAs": "https://www.wikidata.org/wiki/Q11761",
>>   "additionalType": "https://www.wikidata.org/wiki/Q15401699",
>>   "name": "Bronze Age",
>>   "description": "prehistoric period",
>>   "about": "Historical Event"
>> }
>> Any other questions ?
>> -Thad
Received on Wednesday, 30 May 2018 19:52:01 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 30 May 2018 19:52:02 UTC