Enable dropdown to change multiple tags at once

[matkoniecz]

appears to be needed for openstreetmap/id-tagging-schema#1599 (review)

it does not seem to be implementable with the current schema

[kallejre]

Hopefully this suggestion can be applied to all combo field types. Last summer i was tackling similar problem as i tried to create localized preset of deriving recycling:* keys from colour of recycling container.
Closest workaround appears to be creating own (sub)preset for each option and then apply preset when primary key changes (in your case bicycle_rental). I believe that's how selecting crossing=unconrolled adds crossing:markings=yes, but such behaviour is not supported in some editors.

The bicycle_rental issue prompts even more universal response as unlike recycling:*, tunnel or access it aims to add specific tag value as well, not just =yes or user-selected value like majority use cases do.

Could the potential solution be allowing options (and strings) arrays to contain either strings or objects? AI suggested using addTags and removeTags instead tags, but i couldn't think of case where deselecting radio option should keep previously added tags. I also find replacing string with double-nested object bit doubious. Alternative would have been options: [{"_": "shop", "shop": "rental"}], but using underscore as key may cause issues in some poorly-written json parsers.

{
  "key": "bicycle_rental",
  "type": "combo",
  "label": "Bicycle Rental Type",
  "options": [
    "docking_station",
    "dropoff_point",
    "key_dispensing_machine",
    {
      "value": "shop",
      "tags": { "shop": "rental" }
    }
  ],
  "strings": {
    "options": {
      "docking_station": "Docking Station",
      "dropoff_point": "Dropoff Point",
      "key_dispensing_machine": "Key Dispensing Machine",
      "shop": "Shop"
    }
  },
  "autoSuggestions": false
}

Potential prototype schema for my desired recycling container colour:

{
  "key": "colour",
  "type": "semiCombo",
  "label": "Recycling container(s) colour(s)"
  "options": [
    {
      "value": "green",
      "tags": { "recycling:glass_bottles": "yes" }
    },
    {
      "value": "blue", 
      "tags": { "recycling:paper": "yes", "recycling:cardboard": "yes" }
    }
  ]
}