additionalProperties and items sibling clarifications

Signed-off-by: Juan Cruz Viotti <[email protected]>

Author: jviotti

content/2020-12/applicator/additionalProperties.markdown

@@ -42,10 +42,11 @@ related:
 ---
 
 The `additionalProperties` keyword restricts object instance properties not
-described by the [`properties`]({{< ref "2020-12/applicator/properties" >}})
-and [`patternProperties`]({{< ref "2020-12/applicator/patternproperties" >}})
-keywords (if any), to validate against the given subschema. Information about
-the properties that this keyword was evaluated for is reported using
+described by the _sibling_ [`properties`]({{< ref
+"2020-12/applicator/properties"
+>}}) and [`patternProperties`]({{< ref "2020-12/applicator/patternproperties"
+>}}) keywords (if any), to validate against the given subschema. Information
+about the properties that this keyword was evaluated for is reported using
 annotations.
 
 {{<common-pitfall>}}The use of the [`properties`]({{< ref

content/2020-12/applicator/items.markdown

@@ -42,9 +42,9 @@ related:
 ---
 
 The `items` keyword restricts array instance items not described by the
-[`prefixItems`]({{< ref "2020-12/applicator/prefixitems" >}}) keyword (if any),
-to validate against the given subschema. Whether this keyword was evaluated
-against any item of the array instance is reported using annotations.
+_sibling_ [`prefixItems`]({{< ref "2020-12/applicator/prefixitems" >}}) keyword
+(if any), to validate against the given subschema. Whether this keyword was
+evaluated against any item of the array instance is reported using annotations.
 
 {{<common-pitfall>}}This keyword does not prevent an array instance from being
 empty. If needed, use the [`minItems`]({{< ref "2020-12/validation/minitems"