Regarding the construction phases complex type that you want you have a couple of options.
Properties support lists of values, so you could split the type into multiple properties
and give a list of values for each. Then when qualifiers are added you could add a date
range qualifier to each value to specify the phase or just use string qualifiers that say
"phase 1", "phase 2", etc. depending on how detailed the information
is. You can also group the properties in their own item. So you could create an item
called "Potaissa phase 1 construction details" and then have construction phase
just be a list of those specific items, which themselves contain the information.
Date: Wed, 27 Mar 2013 12:55:18 +0100
From: denny.vrandecic(a)wikimedia.de
To: wikidata-l(a)lists.wikimedia.org
Subject: Re: [Wikidata-l] A data model for Roman forts (castra)
I would say this is a good starting point. The Wikidata data model is described in full
detail here [1], and a introductory primer is given here [2]. Qualifiers are not
implemented yet, but will be there soon, and followed by more datatypes (like time, geo,
etc.).
The major difference is that values like "stone" for material or
"opus-quadratum" for technique should not be strings - this does not translate
well. They should be pointing to items, e.g. Q8063 instead of "stone" and
Q2631941 instead of "opus-quadratum".
The other thing is that Wikidata does not really intend to enable constraints in that very
strong sense that your schema chooses. So if someone wants to add a value for material
that you did not preconceive, like Q40861 (Marble), Wikidata-as-a-software will not stop
them from doing so (just as Wikipedia-as-a-software does not stop you from entering that,
either) (see also [3]).
I hope this helps,Denny
[1]
http://meta.wikimedia.org/wiki/Wikidata/Data_model
[2]
http://meta.wikimedia.org/wiki/Wikidata/Notes/Data_model_primer[3]
http://blog.wikimedia.de/2013/02/22/restricting-the-world/
2013/3/27 Flaviu <flaviu(a)gmx.com>
I fully agree with you that the XSD
model cannot by precisely integrated into Wikidata and also I know
Wikidata development is in progress. I think I could deal with
simple properties like "material" but I'm not sure how to deal
with complex properties like "construction phases" I'm not sure.
Even if it is no implementation yet, how these complex properties
could be defined?
On 03/26/2013 11:53 PM, Michael Hale wrote:
You can't integrate the XSD model precisely as it
is defined because Wikidata doesn't allow all of the constraints
that XSD allows. Specifically, you'll notice that you can't
force an item to have a specific property (like the document or
epigraphic reference in your model) and enumerations aren't
currently supported. Wikidata has a global collection of
properties and any item can use any arbitrary subset of them.
The list is here:
http://www.wikidata.org/wiki/Wikidata:List_of_properties.
Some of the ones you want already exist, like material used for
a building.
http://www.wikidata.org/wiki/Property:P186 You'll
want to propose the other ones you want here:
http://www.wikidata.org/wiki/Wikidata:Property_proposal.
I just added two statements (when you use a property, called a
claim without references) to the Potaissa item that you use as
an example.
http://www.wikidata.org/wiki/Q7234612
Date: Tue, 26 Mar 2013 22:50:52 +0200
From: saturnian(a)gmx.com
To: wikidata-l(a)lists.wikimedia.org
Subject: [Wikidata-l] A data model for Roman forts
(castra)
Hi all,
I recently attended "Wikidata meets
archeology" symposium
and I came
across the question how a well structured and
comprehensive data model
of Roman forts (castra) could be integrated into
Wikidata
and then used
on Wikipedia. For this I developed a raw XSD model
based
on the data
model of Wikipedia's Infobox castrum. I put this
model on
the talk page
adding also a
simple example. I would like to know this data model
could be integrated
into Wikidata? It is feasible? Is it too complex?
Thank you,
Saturnian
_______________________________________________
Wikidata-l mailing list
Wikidata-l(a)lists.wikimedia.org
_______________________________________________
Wikidata-l mailing list
Wikidata-l(a)lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata-l
_______________________________________________
Wikidata-l mailing list
Wikidata-l(a)lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata-l
--
Project director Wikidata
Wikimedia Deutschland e.V. | Obentrautstr. 72 | 10963 Berlin
Tel. +49-30-219 158 26-0 |
http://wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e.V. Eingetragen im
Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 B. Als
gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer
27/681/51985.
_______________________________________________
Wikidata-l mailing list
Wikidata-l(a)lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikidata-l