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RE: New guy questions / location where content was created

From: Michael Steidl \(IPTC\) <mdirector@iptc.org>
Date: Wed, 12 Dec 2012 20:28:31 +0100
To: <public-vocabs@w3.org>
Message-ID: <018701cdd89e$ded90790$9c8b16b0$@iptc.org>
Hi Jeff,


I agree, using class Place (http://schema.org/Place) would make the most
sense as it provides text labels and geo coordinates.


A comment on the azimuth issue: the Photo Metadata working group of the IPTC
had a very similar discussion some time ago and came to the conclusion that
it is better to describe precisely (e.g. northeastern corner of 4th and
Vine) what is in the photo as there are no widely available devices for
measuring the azimuth and this may make this property living from guesses -
while more and more cameras have a gps receiver, external or internal.




From: Jeff Meyer [mailto:jeff@gwhat.org] 
Sent: Monday, December 10, 2012 8:55 PM
To: Michael Steidl (IPTC)
Cc: public-vocabs@w3.org
Subject: Re: New guy questions / location where content was created


Hi Michael - 


Thanks for the feedback - very interesting to see the IPTC link.


I'm not sure dateline fills the need, as it is a text property. Is it
possible to define dateline as a geocoordinate?



Using a geocoordinate would help accomodate current digital pictures, many
of which have this information built into their EXIF data.


Azimuth is also critical, as even a basic dateline in a city (corner of 4th
and Vine) wouldn't tell me which direction the picture was looking - e.g.
assuming E-W and N-S street directions, "looking East down Vine from 4th,"
or even "looking at the NW corner of 4th & Vine from the SE corner of 4th &
Vine." For historical photographs, this can help software engines build
historical perspectives and composites much more quickly.


Another new guy question - is there a reason "MediaObject" is defined as
something on the web? I would think schemas are trying to describe items in
the real world, even if they are not available on the web.






On Mon, Dec 10, 2012 at 4:55 AM, Michael Steidl (IPTC) <mdirector@iptc.org>

Hi Jeff


Re "creationLocation": actually the property you request exists - but not as
requested by you.

The facts:

-          The NewsArticle class of schema.org
(http://schema.org/NewsArticle) has a property named dateline and the
definition "The location where the NewsArticle was produced."
The name "dateline" is inherited from an old tradition to start news with
"New York (AP) 10 December 2012 - Mr Doe said ."
which includes the date but also typically the location.

-          From what you write I infer that you want to apply this property
to photos, which is a MediaObject in general and an ImageObject in
particular. Unfortunately none of these classes has such a dateline or
something similar.

-          The IPTC Photo Metadata standard has a Location Created property
and it would be great to have an equivalent property in schema.org. I would
like to add that the IPTC standard as another property: locationShown which
defined the place you can see in the picture. Primarily for nature photos
these places (where created, what is shown) could be quite different. But
locationShown can be expressed by using the about property of the
CreativeWork class of schema.org.


The solutions I propose for discussion are:

a)      Move the dateline up the class hierarchy and make it a property of

b)      Add a property locationCreated  to the MediaObject class.




Michael Steidl

Managing Director of the IPTC [mdirector@iptc.org]

International Press Telecommunications Council 
Web:  <http://www.iptc.org/> www.iptc.org - on Twitter
<http://www.twitter.com/IPTC> @IPTC



From: Jeff Meyer [mailto:jeff@gwhat.org] 
Sent: Friday, December 07, 2012 10:25 PM
To: public-vocabs@w3.org
Subject: New guy questions


Hi - 


New guy trying to learn more here.


Looking for where I can go to find answers to questions like:


> Why is there no schema for thing->manmade->structure or
thing->manmade->structure->building? (all the schema seem to want to jump
straight to what type of building, e.g. Thing > Place > CivicStructure)


> How do I extend the global schema.org schema to add things like
creationLocation (e.g. where was the photograph taken?) and creationAzimuth
(e.g. which direction was the camera pointing?)?


I realize these are basic questions, but the information at schema.org seems
a bit limited & dead end. For example, I understand that I can extend schema
on my own (http://schema.org/docs/extension.html), but creationLocation
seems to be pretty common and generic & I'd hate to do stuff differently
from the way others are doing it. (e.g. what's the location for a picture of
the Grand Canyon or Mount Everest?).


Do I need to submit proposals at





Jeff Meyer
Global World History Atlas


Jeff Meyer
Global World History Atlas
Received on Wednesday, 12 December 2012 19:29:06 UTC

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