From a7e1f7b6209bb30565458698baaf0e3d701595f1 2014-04-23 00:44:54
From: Jessica B. Hamrick <jhamrick@berkeley.edu>
Date: 2014-04-23 00:44:54
Subject: [PATCH] Make metadata fields be optional

---

diff --git a/IPython/nbformat/v3/v3.withref.json b/IPython/nbformat/v3/v3.withref.json
index 9ed9d97..9a711a2 100644
--- a/IPython/nbformat/v3/v3.withref.json
+++ b/IPython/nbformat/v3/v3.withref.json
@@ -71,7 +71,7 @@
           "type": "object",
           "description": "metadata of the current worksheet",
           "id": "metadata",
-          "required": true
+          "required": false
         }
       }
     },
@@ -99,7 +99,7 @@
         "metadata": {
           "type": "object",
           "id": "metadata",
-          "required": true
+          "required": false
         },
         "source": {
           "description": "for code cell, the source code",
@@ -140,7 +140,7 @@
         "metadata": {
           "type": "object",
           "id": "metadata",
-          "required": true
+          "required": false
         },
         "collapsed": {
           "type": "boolean",