JSON requires that member keys are strings, no need to repeat that

Author: lanthaler

spec/latest/json-ld-syntax/index.html

@@ -2843,8 +2843,7 @@ <h3>Node Object</h3>
   <li><tref>false</tref>,</li>
   <li><tref>null</tref>,</li>
   <li><tref>node object</tref>,</li>
-  <li><tref>expanded typed value</tref>,</li>
-  <li><tref>expanded language-tagged string</tref>,</li>
+  <li><tref>expanded value</tref>,</li>
   <li><tref>list</tref> or <tref>set</tref>,</li>
   <li>an <tref>array</tref> of zero or more of the possibilities above,</li>
   <li>a <tref>language map</tref>, or </li>
@@ -2894,8 +2893,7 @@ <h2>Annotation Map</h2>
   An <tref>annotation map</tref> may
   be used as a <tref>term</tref> value within a <tref>node object</tref> if the
   term is defined with <code>@container</code> set to <code>@annotation</code>.
-  The keys of a <tref>annotation map</tref> MUST be
-  <tref title="string">strings</tref> with an associated value that is any
+  The values of the members of an <tref>annotation map</tref> MUST be any
   of the following types:</p>
 <ul>
   <li><tref>string</tref>,</li>