Category talk:Aircraft registrations
Category:Re-used aircraft registrations[edit]
This category appears to be redundant. Commons policy in COM:CAT states "It is essential that every file can be found by browsing the category structure", for the purpose of a user searching for a particular type of file/image that will be suitable for their needs. The top category for individual aircraft registrations should always be of a standardised form such as XXXXX (aircraft), to disambiguate it from other subjects such as XXXXX (bird) or XXXXX (city) or XXXXX (mathematics), etc. If we have images at Commons of more than one aircraft type/model for the same registration, then (and only then) do we need to create sub-categories for the multiple types/models. Those sub-cats are then named in a form such as XXXXX (Boeing 707), XXXXX (Piper J3C), etc, where the aircraft manufacturer/type/model is abbreviated to achieve just enough understandable disambiguation. Only the top category needs to be in Category:Aircraft by registration and Category:Aircraft registered in countryXX, because its sub-cats will inherit those properties in the category hierarchy. If a user is searching for an image based on either a registration or aircraft manufacturer/type/model, they can then browse the category tree to access the image via the above parameters. The Category:Re-used aircraft registrations seems to have no useful purpose, and therefore superfluous to Commons policies and aims. I don't recall ever placing registration categories into it, and I'm guessing that the present total of 711 sub-cats is nowhere near the theoretical total of current candidate categories, and if so, it cannot even be a comprehensive reflection of its own 'rationale'. I propose that it should be removed from all its sub-cats, then itself be deleted. PeterWD (talk) 09:48, 12 December 2016 (UTC)
Delete @PeterWD and Docu: This category does not serve a meaningful purpose. As per PeterWD, it should be deleted. There has been no opposition to it in a couple of years, so let's close this and the category. Josh (talk) 23:29, 29 August 2018 (UTC)
@PeterWD: Closed (no objections; delete) Josh (talk) 22:17, 18 September 2019 (UTC)