define defaults for "nodeType" in the XML Object

see https://spec.openapis.org/oas/latest#xml-object

Author: karenetheridge

src/schemas/validation/meta.yaml

@@ -21,6 +21,34 @@ properties:
     $ref: '#/$defs/external-docs'
   xml:
     $ref: '#/$defs/xml'
+  if:
+    type: object
+    required:
+      - xml
+  then:
+    if:
+      anyOf:
+        - required:
+            - $ref
+        - required:
+            - $dynamicRef
+        - required:
+            - type
+          properties:
+            type:
+              const: array
+    then:
+      properties:
+        xml:
+          properties:
+            nodeType:
+              default: none
+    else:
+      properties:
+        xml:
+          properties:
+            nodeType:
+              default: element
 
 $defs:
   discriminator:

tests/schema/pass/media-type-examples.yaml

@@ -88,6 +88,14 @@ paths:
                   type: object
                   xml:
                     nodeType: none
+                forCoverage:
+                  type: object
+                  $ref: '#/components/schemas/Address'
+                  xml: {}
+                forCoverage2:
+                  type: object
+                  $dynamicRef: '#/components/schemas/Address'
+                  xml: {}
           application/x-www-form-urlencoded:
             schema:
               type: object