contentSchema: type MUST be a schema if it is not ignored

Author: ssilverman

jsonschema-validation.xml

@@ -1015,15 +1015,17 @@
 
             <section title="contentSchema">
                 <t>
-                    If the instance is a string, and if "contentMediaType" is present, this
-                    property contains a schema which describes the structure of the string.
+                    If the instance is a string containing valid JSON, and if "contentMediaType" is
+                    present, this property is used to validate the string. If the string is not
+                    valid JSON, then the validation fails.
                 </t>
                 <t>
                     This keyword MAY be used with any media type that can be mapped into
                     JSON Schema's data model.
                 </t>
                 <t>
-                    The value of this property SHOULD be ignored if "contentMediaType" is not present.
+                    The value of this property MUST be a valid JSON schema. It SHOULD be ignored if
+                    "contentMediaType" is not present.
                 </t>
             </section>
 
@@ -1176,9 +1178,9 @@
                     the entire resource being described MAY be removed in the future.
                 </t>
                 <t>
-                    When the "deprecated" keyword is applied to an item in an array by means of 
-                    "items", if "items" is a single schema, the deprecation relates to the whole 
-                    array, while if "items" is an array of schemas, the deprecation relates to 
+                    When the "deprecated" keyword is applied to an item in an array by means of
+                    "items", if "items" is a single schema, the deprecation relates to the whole
+                    array, while if "items" is an array of schemas, the deprecation relates to
                     the corresponding item according to the subschemas position.
                 </t>
                 <t>