Added calculation schema

schemas/json/calculation/calculation.schema.v1.json

@@ -0,0 +1,41 @@
+{
+  "$id": "https://altinncdn.no/schemas/json/calculation/calculation.schema.v1.json",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Altinn 3 Calculation",
+  "description": "Schema that describes the custom calculation configuration for Altinn applications.",
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "$schema": {
+      "type": "string",
+      "title": "Schema",
+      "description": "The schema that this file adheres to"
+    },
+    "calculations": {
+      "type": "object",
+      "patternProperties": {
+        "^.+$": {
+          "type": "object",
+          "additionalProperties": false,
+          "properties": {
+            "expression": {
+              "title": "Expression returning any value",
+              "description": "The expression can return any value. The expression can contain references to other fields in the form.",
+              "anyOf": [
+                { "$ref": "../layout/expression.schema.v1.json#/definitions/string" },
+                { "$ref": "../layout/expression.schema.v1.json#/definitions/number" },
+                { "$ref": "../layout/expression.schema.v1.json#/definitions/boolean" }
+              ]
+            }
+          },
+          "required": [
+            "expression"
+          ]
+        }
+      }
+    }
+  },
+  "required": [
+    "calculations"
+  ]
+}