JSON Schema validation: IF/THEN/ELSE question using $ref

[dlukacic]

I have this JSON:

{
    "ActionSet": {
        "A1.2": {
            "ID": "A1.2",
                "AID": "AID-001-02",
                    "ActionProperty": {
                "$ref": "#/PC-Properties/rb6_cls_in_scope"
            },
            "SetValue": "In scope",
                "Comment": ""
        },
        "A1.3": {
            "ID": "A1.3",
                "AID": "AID-001-03",
                    "ActionProperty": {
                "$ref": "#/PC-Properties/rb6_cls_in_scope"
            },
            "SetValue": "Not in scope",
                "Comment": ""
        },
        "A2.1": {
            "ID": "A2.1",
                "AID": "AID-002-01",
                    "ActionProperty": {
                "$ref": "#/PC-Properties/rb6_CoC__div_process"
            },
            "SetValue": 2,
                "Comment": "Set to 'Ongoing'"
        }
    }
}

And I have this JSON-Schema:

{
    "properties": {
        "ID": {
            "type": "string",
            "pattern": "^A\\d+\\.\\d+$"
        },
        "AID": {
            "type": "string",
            "pattern": "^AID-\\d{3}-\\d{2}$"
        },
        "ActionProperty": {
            "type": "object"
        },
        "SetValue": {
            "type": [
                "integer",
                "string"
            ]
        },
        "Comment": {
            "type": "string"
        }
    },
    "if": {
        "properties": {
            "ActionProperty": {
    ??? ===>           "$ref": "#/PC-Properties/rb6_CoC__div_process"  <=====???
            }
        }
    },
    "then": {
        "properties": {
            "SetValue": {
                "type": "integer",
                "const": 99
            }
        }
    }
}

I want to validate, that if ActionProperty has this value (or reference):

 "ActionProperty": {
                "$ref": "#/PC-Properties/rb6_CoC__div_process"
            },

The SetValue must be a integer with constant value 99.

What shall I use here?:

"if": {
        "properties": {
            "ActionProperty": {
    ??? ===>           "$ref": "#/PC-Properties/rb6_CoC__div_process"  <=====???
            }
        }
    }

Your help is so much appreciated. Thank you.

[jdesrosiers]

You can use const. const takes any type of value including objects.

  "if": {
    "properties": {
      "ActionProperty": {
        "const": { "$ref": "#/PC-Properties/rb6_CoC__div_process" }
      }
    },
    "required": ["ActionProperty"]
  },

[dlukacic]

[jdesrosiers]

You can have multiple conditions using allOf.

{
  "allOf": [
    { "if": {...}, "then": {...} },
    { "if": {...}, "then": {...} }
  ]
}

Or, you can do something like elsif by nesting the conditions.

{
  "if": {...},
  "then": {...},
  "else": {
    "if": {...},
    "then": {...}
  }