EntitySchema talk:E297

Data Model

Description of the data model. Simon.letort (talk) 19:15, 25 March 2021 (UTC)

Schema proposal

See Wikidata:Schema_proposals/sailboat_class. Simon.letort (talk) 03:37, 19 March 2021 (UTC)

Proposed Schema from Teester

The following schema seems to satisfy all the criteria of the proposal. The model item passes.

Schema Text

Translation

PREFIX pq: <http://www.wikidata.org/prop/qualifier/> PREFIX ps: <http://www.wikidata.org/prop/statement/> PREFIX p: <http://www.wikidata.org/prop/> PREFIX wd: <http://www.wikidata.org/entity/> PREFIX wdt: <http://www.wikidata.org/prop/direct/> start = @<sailboatclass> <sailboatclass> { # Defining properties wdt:P31 [wd:Q106179098]; wdt:P279 @<subclass> +; # Required properties wdt:P18 .+; wdt:P176 .; wdt:P287 .; p:P2048 @<height>; p:P2049 @<width>; p:P2043 @<length1>; p:P2043 @<length2>; p:P2067 @<mass1>; p:P2067 @<mass2>; # Optional properties wdt:P5962 .*; wdt:P2079 .*; wdt:P516 .*; wdt:P5869 .*; } <subclass> EXTRA wdt:P31 { wdt:P31 [wd:Q16103215]; } <length1> { pq:P642 [wd:Q2358152]; } <length2> { pq:P642 [wd:Q1817392]; } <width> { pq:P642 [wd:Q2376482]; } <height> { pq:P642 [wd:Q244777 wd:Q2446632] } <mass1> { pq:P642 [wd:Q5636358] } <mass2> { pq:P642 [wd:Q5461048] }

Start at<sailboatclass> <sailboatclass> has 1 instance of (P31) with value sailboat class (Q106179098) 1 or more subclass of (P279) with shape <subclass> 1 or more image (P18) with any value 1 manufacturer (P176) with any value 1 designed by (P287) with any value 1 height (P2048) with shape <height> 1 width (P2049) with shape <width> 1 length (P2043) with shape <length1> 1 length (P2043) with shape <length2> 1 mass (P2067) with shape <mass1> 1 mass (P2067) with shape <mass2> 0 or more sail emblem (P5962) with any value 0 or more fabrication method (P2079) with any value 0 or more powered by (P516) with any value 0 or more model item (P5869) with any value <subclass> has 1 or more instance of (P31) with: 1 instance of (P31) with value boat type (Q16103215) <length1> has 1 qualifier of (P642) with value length overall (Q2358152) <length2> has 1 qualifier of (P642) with value waterline length (Q1817392) <width> has 1 qualifier of (P642) with value beam (Q2376482) <height> has 1 qualifier of (P642) with value draft (Q244777) or air draft (Q2446632) <mass1> has 1 qualifier of (P642) with value displacement (Q5636358) <mass2> has 1 qualifier of (P642) with value sailing ballast (Q5461048)

You can test this schema here (you'll have to paste in the schema) using the following query for the model item:

SELECT ?item WHERE { BIND(wd:Q97179551 as ?item)} LIMIT 1

Try it!

I have not created an EntitySchema for this yet in case there is any feedback that needs to be incorporated to the schema. Teester (talk) 21:31, 29 March 2021 (UTC)

Thanks a lot. I created the EntitySchema based on your proposed schema EntitySchema:E297. I copied your answer Wikidata_talk:Schema_proposals/sailboat_class in this talk page and redirected the talk page. Many thanks again, very helpful. Simon.letort (talk) 04:41, 2 April 2021 (UTC)

height (P2048)

Currently, J/92s (Q97179551) fails this schema due to height (P2048). The schema specifies that the item should have 1 height (P2048) with 1 qualifier of (P642) which has a value of either draft (Q244777) or air draft (Q2446632).

J/92s (Q97179551) has 2 height (P2048), one with a qualifier of (P642) with value draft (Q244777) and another with qualifier of (P642) with value mast (Q331744).

Should the schema be adjusted to allow mast (Q331744) be used with height (P2048)? Also, can a sailboat class have both height (P2048)s with draft (Q244777) and a air draft (Q2446632) or should it have one or the other? I don't know enough about boats to say. Teester (talk) 09:19, 6 April 2021 (UTC)