diff --git a/jsonschema-core.xml b/jsonschema-core.xml
index f387940c..75eecd4a 100644
--- a/jsonschema-core.xml
+++ b/jsonschema-core.xml
@@ -185,11 +185,18 @@
                 </t>
             </section>
 
-            <section title="JSON Schema document">
+            <section title="JSON Schema documents">
                 <t>
                     A JSON Schema document, or simply a schema, is a JSON document used to describe an instance.
                     A schema is itself interpreted as an instance.
-                    A JSON schema MUST be an object.
+                    A JSON Schema MUST be an object or a boolean.
+                </t>
+                <t>
+                    Boolean values are equivalent to the following behaviors:
+                    <list style="hanging">
+                        <t hangText="true">Always passes validation, as if the empty schema {}</t>
+                        <t hangText="false">Always fails validation, as if the schema { "not":{} }</t>
+                    </list>
                 </t>
                 <t>
                     Properties that are used to describe the instance are called keywords, or schema keywords.
@@ -231,6 +238,9 @@
                     In this example document, the schema titled "array item" is a subschema,
                     and the schema titled "root" is the root schema.
                 </t>
+                <t>
+                    As with the root schema, a subschema is either an object or a boolean.
+                </t>
             </section>
 
         </section>
@@ -299,8 +309,11 @@
 
         <section title="Schema references with $ref">
             <t>
-                Any time a subschema is expected, a schema may instead use an object containing a "$ref" property.
-                The value of the $ref is a URI Reference.
+                The "$ref" keyword is used to reference a schema, and provides the ability to validate recursive structures through self-reference.
+            </t>
+            <t>
+                An object schema with a "$ref" property MUST be interpreted as a "$ref" reference.
+                The value of the "$ref" property MUST be a URI Reference.
                 Resolved against the current URI base, it identifies the URI of a schema to use.
                 All other properties in a "$ref" object MUST be ignored.
             </t>
@@ -323,7 +336,7 @@
                     <xref target="RFC3986">RFC3986 Section 5.1</xref> defines how to determine the default base URI of a document.
                 </t>
                 <t>
-                    Informatively, the initial base URI of a schema is the URI it was found at, or a suitable substitute URI if none is known.
+                    Informatively, the initial base URI of a schema is the URI at which it was found, or a suitable substitute URI if none is known.
                 </t>
             </section>
 
@@ -660,6 +673,7 @@ User-Agent: so-cool-json-schema/1.0.2 curl/7.43.0
                     <t hangText="draft-wright-json-schema-01">
                         <list style="symbols">
                             <t>Updated intro</t>
+                            <t>Allowed for any schema to be a boolean</t>
                         </list>
                     </t>
                     <t hangText="draft-wright-json-schema-00">
diff --git a/jsonschema-validation.xml b/jsonschema-validation.xml
index 7bbd6c70..637051df 100644
--- a/jsonschema-validation.xml
+++ b/jsonschema-validation.xml
@@ -327,8 +327,7 @@
 
             <section title="items">
                 <t>
-                    The value of "items" MUST be either an object or an array of objects.
-                    Each object MUST be a valid JSON Schema.
+                    The value of "items" MUST be either a valid JSON Schema or an array of valid JSON Schemas.
                 </t>
                 <t>
                     If absent, it can be considered present with an empty schema.
@@ -350,8 +349,7 @@
 
             <section title="additionalItems">
                 <t>
-                    The value of "additionalItems" MUST be a boolean or an object.
-                    If it is an object, the object MUST be a valid JSON Schema.
+                    The value of "additionalItems" MUST be a valid JSON Schema.
                 </t>
                 <t>
                     If absent, it can be considered present with an empty schema.
@@ -466,7 +464,7 @@
             <section title="properties">
                 <t>
                     The value of "properties" MUST be an object. Each value of this object
-                    MUST be an object, and each object MUST be a valid JSON Schema.
+                    MUST be a valid JSON Schema.
                 </t>
                 <t>
                     If absent, it can be considered the same as an empty object.
@@ -487,7 +485,7 @@
                     The value of "patternProperties" MUST be an object. Each property name
                     of this object SHOULD be a valid regular expression, according to the
                     ECMA 262 regular expression dialect. Each property value of this object
-                    MUST be an object, and each object MUST be a valid JSON Schema.
+                    MUST be a valid JSON Schema.
                 </t>
                 <t>
                     If absent, it can be considered the same as an empty object.
@@ -506,8 +504,7 @@
 
             <section title="additionalProperties">
                 <t>
-                    The value of "additionalProperties" MUST be a boolean or an
-                    object.  If it is an object, the object MUST be a valid JSON Schema.
+                    The value of "additionalProperties" MUST be a valid JSON Schema.
                 </t>
                 <t>
                     If "additionalProperties" is absent, it may be considered present with
@@ -535,12 +532,11 @@
                 </t>
                 <t>
                     This keyword's value MUST be an object. Each property specifies a dependency.
-                    Each dependency value MUST be an object or an array.
+                    Each dependency value MUST be an array or a valid JSON Schema.
                 </t>
                 <t>
-                    If the dependency value is an object, it MUST be a valid JSON Schema. If the
-                    dependency key is a property in the instance, the dependency value must validate
-                    against the entire instance.
+                    If the dependency value is a subschema, and the dependency key is a property
+                    in the instance, the entire instance must validate against the dependency value.
                 </t>
                 <t>
                     If the dependency value is an array, each element in the array,