platforms:
    - name: Alpine
      versions:
        - '3.18'

$.galaxy_info.platforms[0].versions[0] '3.18' is not one of ['6.1', '7.1', '7.2', 'all']. 

    "AIXPlatformModel": {
      "properties": {
        "name": {
          "const": "AIX",
          "title": "Name",
          "type": "string"
        },
        "versions": {
          "default": "all",
          "items": {
            "enum": ["6.1", "7.1", "7.2", "all"],
            "type": "string"
          },
          "type": "array"
        }
      },
      "title": "AIXPlatformModel",
      "type": "object"
    },