Wikidata:Property proposal/free height
free height | clear height | free height under the grid | stage floor to underside of grid
[edit]Originally proposed at Wikidata:Property proposal/Generic
| Description | vertical distance from the floor level to the lowest obstruction in the ceiling of an indoor or outdoor space |
|---|---|
| Data type | Quantity |
| Allowed units | metres; feet and inches |
| Example 1 | Main Stage at Surrey Arts Centre (Q135466638) ⇒ "39 feet" [1] |
| Example 2 | HUB International Theatre (Q134582650) ⇒ "69 feet" [2] |
| Example 3 | Babs Asper Theatre (Q106625804) ⇒ "59 feet, 9 inches", "18.21 meters" [3] |
| See also | clearance (P2793) |
Motivation
[edit]This property will be used to describe stage dimensions of event venues. A group of domain experts is currently in the process of specifying how the technical specifications and the equipment of cultural venues shall be described in Wikidata. So far, information about stage specifications have been entered for about 240 items.
See the WikiProject Cultural venues for further details.
As there is a fundamental difference between the "height" and the "free height" of a stage, which is highly relevant in practice, we felt that it was necessary to create a specific property for the latter.
The current definition of clearance (P2793) has some similarities with the proposed property. It is however specific to bridges. It furthermore presents the difficulty that it confounds two related concepts: (a) the clearance under a bridge; (b) the clearance of a vessel (i.e. the vertical distance between the waterline and its highest element (see for example the French definition of the property).
As a matter of fact, very similar concepts are used for: (1) built spaces; (2) entrances / openings in buildings; (3) underpasses in the context of transportation infrastructure; (4) vessels / vehicles. The current definition of this property proposal ("vertical distance from the floor level to the lowest obstruction in the ceiling of an indoor or outdoor space") would apply only to built spaces.
--Beat Estermann (talk) 20:12, 21 November 2025 (UTC)
Discussion
[edit]
Notified participants of WikiProject Performing arts
Notified participants of WikiProject Cultural venues
Support This seems useful to me and it sounds like something we are missing. ArthurPSmith (talk) 18:29, 22 November 2025 (UTC)- Support Useful property for building parts Pmt (talk) 18:28, 3 December 2025 (UTC)
Strong support Documenting stage dimensions has been challenging. With this property, it will be easier and more accurate. --Fjjulien (talk) 14:14, 11 December 2025 (UTC)- Support --Vero Marino (talk) 15:02, 11 December 2025 (UTC)
- Strong support This would be extremely usefull, because it is a core proproerty to define the technical possibilities of a stage . -- Chris Van Goethem
- Support Beireke1 (talk) 14:06, 18 December 2025 (UTC)
- Support dlh28 (talk) 16:33, 18 December 2025 (UTC)
- @Beat Estermann, ArthurPSmith, Pmt, Fjjulien, Vero Marino, ChrisVGoethem: @Dlh28:
Done --Tinker Bell ★ ♥ 04:42, 2 January 2026 (UTC)