Wikidata:WikiProject Railways/Properties for rolling stock
Hi all,
at the moment, the properties for railway rolling stock are pretty inconsistent. Here are those that already exist (aka, I've found). Please feel free to comment! --Jcornelius (talk) 22:51, 31 July 2020 (UTC)
Properties for railway rolling stock edit
| Title | ID | Data type | Description | Examples | Inverse |
|---|---|---|---|---|---|
| instance of | P31 | Item | instance of: that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform) | CP Class 5600 <instance of> locomotive class | - |
| subclass of | P279 | Item | subclass of: this item is a subclass (subset) of that item; all instances of this item are instances of that item; different from P31 (instance of), e.g.: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform) | CP Class 5600 <subclass of> electric locomotive | - |
| inception | P571 | Point in time | date of establishment: time when an entity begins to exist; for date of official opening use P1619 | CP Class 5600 <inception> 1993 | - |
| country | P17 | Item | country: sovereign state that this item is in (not to be used for human beings) | CP Class 5600 <country> Portugal | - |
| country of origin | P495 | Item | country of origin: country of origin of this item (creative work, food, phrase, product, etc.) | South African Class NG G12 2-6-2+2-6-2 <country of origin> United Kingdom | - |
| owned by | P127 | Item | proprietor, property and owned by: owner of the subject | CP Class 5600 <owned by> Comboios de Portugal | owner of |
| operator | P137 | Item | operator: person, profession, or organization that operates the equipment, facility, or service | CP Class 5600 <operator> Comboios de Portugal | item operated |
| manufacturer | P176 | Item | manufacturer: (main or final) manufacturer or producer of this product | CP Class 5600 <manufacturer> Siemens Mobility | product or material produced or service provided |
| location of creation | P1071 | Item | place where the item was conceived or made; where applicable, location of final assembly | CP Class 5600 <location of creation> Amadora | - |
| total produced | P1092 | Quantity | total produced and print circulation: quantity of item produced | CP Class 5600 <total produced> 30 | - |
| quantity | P1114 | Quantity | number of objects: number of instances of this subject in the universe of the subject (the actual number of instances in Wikidata may be lower or higher) | CP Class 5600 <quantity> 29 | - |
| service entry | P729 | Point in time | service entry: date or point in time on which a piece or class of equipment entered operational service | CP Class 5600 <service entry> 1993 | - |
| service retirement | P730 | Point in time | service retirement: date or point in time on which a piece or class of equipment was retired from operational service ; use P2669 for end of a public service | South African Class NG G12 2-6-2+2-6-2 <service retirement> 1959 | - |
| track gauge | P1064 | Item | track gauge: spacing of the rails on a railway track | CP Class 5600 <track gauge> 1668 mm track gauge | - |
| wheel arrangement | P2978 | Item | wheel arrangement: wheel/axle arrangement for locomotives, railcars and other rolling stock | CP Class 5600 <wheel arrangement> Bo′Bo′ | - |
| wheelbase | P3039 | Quantity | wheelbase: horizontal distance between the centers of the front and rear wheels | CP Class 5600 <wheelbase> 10,500 mm | - |
| length with qualifier criterion used | P1013 | Item | criterion and declared deserted: property by which a distinction or classification is made | CP Class 5600 <length> 20,450 mm <criterion used> length over buffers | - |
| serial number with qualifier issued by | P2378 | Item | Q117012262: organisation or other agent that issues or allocates an identifier, code, classification number, etc. | South African Class NG G12 2-6-2+2-6-2 <serial number> 6365–6366 <issued by> Beyer, Peacock and Company | - |
| height | P2048 | Quantity | height, human height and body length: vertical length of an entity | CP Class 5600 <height> 3.5 P2067 | - |
| mass | P2067 | Quantity | mass: mass (in colloquial usage also known as weight) of the item | CP Class 5600 <mass> 86 t | - |
| type of electrification | P930 | Item | railway electrification system: electrification system scheme and/or voltage | CP Class 5600 <type of electrification> 25 kV AC railway electrification | - |
| nominal power capacity | P2109 | Quantity | nameplate capacity and power rating: power produced by the engine, plant, or reactor (use with unit of power) | CP Class 5600 <nominal power capacity> 5600 kW | - |
| fleet or registration number with qualifier issued by | P2378 | Item | Q117012262: organisation or other agent that issues or allocates an identifier, code, classification number, etc. | CP Class 5600 <fleet or registration number> 5601–5630 <issued by> Comboios de Portugal | - |
| powered by | P516 | Item | electric power source and engine model: equipment or engine used by the subject to convert a source or energy into mechanical energy | CP Class 1500 <powered by> ALCO 244 | - |
| railway signalling system | P3019 | Item | railway signalling system: type of signalling used on this railway line | CP Class 5600 <railway signalling system> European Train Control System | - |
... <feel free to add more>
Questions on the above properties edit
Based on the above listed properties, I've the following questions:
- How do you add inception (P571)? I would usually add two qualifiers (start time (P580), end time (P582)) to it, but is that really the best way to show a period of time in which the rolling stock was produced?
- location of creation (P1071) Gives me a constraint that an item with location of creation (P1071) shouldn't have country (P17). Does that really make sense?
- Yes, as that would be country of origin (P495)
- I would differ between total produced (P1092) and quantity (P1114), as the latter shows the current (or at least qualified by a date) amount of vehicles, while the first shows the originally produced amount? Would you agree?
- Sounds sensible. The quantity (P1114) values have (usually) been imported from de.wikipedia's infobox (Anzahl)
- wheelbase (P3039) gives me a constraint saying that the item should be a mode of transport (Q334166) or automobile model (Q3231690). Needs to be adapted, right?
- Regarding length (P2043): It is really common to define a length of the vehicle and a length from buffer to buffer. How could that be (better) qualified?
- add the qualifier criterion used (P1013) with either length over buffers (Q25380013), length over headstocks (Q111900404), or length over coupler pulling faces (Q111900522).
- How do a qualify height (P2048) better? Often, rolling stock has heights above the rail, or above the platform, etc.
- Is type of electrification (P930) really the best one for rolling stock? Seems to be originally used for railway lines.
- Can fleet or registration number (P2802) be used for railway rolling stock? The word "fleet" kind of made me think that it was created only for ships.
- Yes. See the example on the property's talk page.
- Is powered by (P516) really the right one to describe the kind of motor? Further, it gives me a constraint.
- railway signalling system (P3019) is made for railway lines. Could be extended to rolling stock as well?
... <feel free to add more>
Suggestions for new properties edit
- I haven't found any good property to define the maximum speed of a rail vehicle. speed limit (P3086) seems to be for roads and railway lines, right?
- Would be good to have something like "Current collector" or "Current pickup" (for the above mentioned example that would be pantograph (Q657874))
- Would be good to have something like "Tractive effort" (for the above mentioned example that would be 300 kN)
- Also something to define the acceleration (like "380 s (0–320 km/h)")
- Would be good to have something like "Brake(s)" to define better what kind of brakes the vehicle has. Also something like "Braking deceleration".
- I didn't find anything to define the railway coupling (Q1501648) and the "Pivot distance".
- ... <feel free to add more>
Other stuff edit
- I find it really hard to think about all the properties that are needed for a "complete" (whatever that means) rolling stock item. Does it make sense to have a least a minimum of ~10 properties that every rolling stock item should have? Something like a template? --Jcornelius (talk) 22:51, 31 July 2020 (UTC)
- I think that this is helpful. There is a possibilty to create such an item with a form using Cradle. I can help you to create the Form. This is a example for such a form to create a item about railway stations. [1]--Hogü-456 (talk) 20:41, 1 August 2020 (UTC)
- .... <feel free to add more>