From ac8e207979b5392692c9c67f3ae7729f1562bba4 Mon Sep 17 00:00:00 2001
From: Henry Andrews <henry@cloudflare.com>
Date: Fri, 28 Oct 2016 10:38:28 -0700
Subject: [PATCH] Allow an empty array for "required".

This addresses the enhancement requested in issue #69.
---
 jsonschema-validation.xml | 5 ++---
 schema.json               | 6 ++++--
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/jsonschema-validation.xml b/jsonschema-validation.xml
index d5724e03..3852d9ed 100644
--- a/jsonschema-validation.xml
+++ b/jsonschema-validation.xml
@@ -435,9 +435,8 @@
 
             <section title="required">
                 <t>
-                    The value of this keyword MUST be an array. This array MUST have at
-                    least one element. Elements of this array MUST be strings, and MUST be
-                    unique.
+                    The value of this keyword MUST be an array. Elements of this array
+                    MUST be strings, and MUST be unique.
                 </t>
                 <t>
                     An object instance is valid against this keyword if its
diff --git a/schema.json b/schema.json
index 4e9b565e..93a614fe 100644
--- a/schema.json
+++ b/schema.json
@@ -21,8 +21,10 @@
         "stringArray": {
             "type": "array",
             "items": { "type": "string" },
-            "minItems": 1,
             "uniqueItems": true
+        },
+        "nonEmptyStringArray": {
+            "allOf": [ { "$ref": "#/definitions/stringArray" }, { "minItems": 1 } ]
         }
     },
     "type": "object",
@@ -118,7 +120,7 @@
             "additionalProperties": {
                 "anyOf": [
                     { "$ref": "#" },
-                    { "$ref": "#/definitions/stringArray" }
+                    { "$ref": "#/definitions/nonEmptyStringArray" }
                 ]
             }
         },