Support multi-fields

test/packages/good/data_stream/k8s_data_stream/fields/base-fields.yml

@@ -21,4 +21,18 @@
       level: core
       type: keyword
       description: Region name.
-      ignore_above: 1024
+      ignore_above: 1024
+- name: host
+  title: Host
+  group: 2
+  type: group
+  fields:
+    - name: os.name
+      level: extended
+      type: keyword
+      ignore_above: 1024
+      multi_fields:
+        - name: text
+          type: text
+          norms: false
+          default_field: false

versions/1/data_stream/fields/fields.spec.yml

@@ -105,6 +105,13 @@ spec:
         type: string
         enum:
           - ecs
+      norms:
+        description: Set to false to disable normalization factors used for scoring calculation.
+        type: boolean
+        default: true
+      multi_fields:
+        description: Additional mappings for this field.
+        $ref: "#"
       fields:
         description: Sub-fields, when type is group
         $ref: "#"     # JSON-schema syntax for pointing to the root of the schema