Add requireAllExcept keyword

Author: jdesrosiers

jsonschema-validation.xml

@@ -491,6 +491,18 @@
                     </t>
                 </section>
 
+                <section title="requiredAllExcept">
+                    <t>
+                        The value of this keyword MUST be an array.
+                        Elements of this array, if any, MUST be strings, and MUST be unique.
+                    </t>
+                    <t>
+                        An object instance is valid against this keyword if every property name
+                        declared in "properties" except those that appear in the array is the name
+                        of a property in the instance.
+                    </t>
+                </section>
+
                 <section title="dependentRequired">
                     <t>
                         The value of this keyword MUST be an object.  Properties in
@@ -1429,6 +1441,11 @@
             </t>
             <t>
                 <list style="hanging">
+                    <t hangText="draft-bhutton-json-schema-next">
+                        <list style="symbols">
+                            <t>Add the "requireAllExcept" keyword</t>
+                        </list>
+                    </t>
                     <t hangText="draft-bhutton-json-schema-validation-00">
                         <list style="symbols">
                             <t>Correct email format RFC reference to 5321 instead of 5322</t>

meta/validation.json

@@ -61,6 +61,7 @@
         "maxProperties": { "$ref": "#/$defs/nonNegativeInteger" },
         "minProperties": { "$ref": "#/$defs/nonNegativeIntegerDefault0" },
         "required": { "$ref": "#/$defs/stringArray" },
+        "allRequiredExcept": { "$ref": "#/$defs/stringArray" },
         "dependentRequired": {
             "type": "object",
             "additionalProperties": {