How to define path with wildcard properties/keys in JSON schema

Question

I have YAML files that look like this...

material: iron_leggings
displayName: "Plated Leggings"
rare:
  effects:
    entry0:
      slot: legs
      name: life_steal

And I want to validate (using a JSON schema) that the slot property contains legs if the materials property contains the word leggings.

Problem: The rare key can change name [common, uncommon, rare] and the entry0 property can also take any name. I want a schema that can path into: [common, uncommon, rare] -> effects -> (wildcard) -> slot

This is part of the schema I have so far, but I don't want to copy it for all combinations of possible keys:

      "if": { "properties": { "material": { "pattern": "(leggings)" } } },
      "then": {
        "properties": {
          "rare": {
            "properties": {
              "effects": {
                "properties": {
                  "entry0": { "properties": { "slot": { "pattern": "legs" } } } } } } } } } }

Is this possible?

Answer 1

Use additionalProperties in place of properties with a name.

{
  "if": {
    "properties": {
      "material": {
        "pattern": "(leggings)"
      }
    }
  },
  "then": {
    "properties": {
      "rare": {
        "properties": {
          "effects": {
            "additionalProperties": {       // <- this
              "properties": {
                "slot": {
                  "pattern": "legs"
                }
              }
            }
          }
        }
      }
    }
  }
}