Clarify "known contexts" in Context Validation section.

index.html

@@ -2319,7 +2319,7 @@ <h3>Context Validation</h3>
 executed business rules specific to the input in the document. For more
 rationale related to this algorithm, see Section [[[#validating-contexts]]].
 This algorithm takes inputs of a document ([=map=] |inputDocument|), a set of
-approved JSON-LD Contexts ([=map=] |expectedContext|), and a boolean to
+known JSON-LD Contexts ([=array=] |knownContext|), and a boolean to
 recompact when unknown contexts are detected ([=boolean=] |recompact|), and
 returns a [=map=] that contains the following:
         </p>
@@ -2354,7 +2354,7 @@ <h3>Context Validation</h3>
 which might be undefined.
           </li>
           <li>
-If |contextValue| does not deeply equal |expectedContext|, any subtree in
+If |contextValue| does not deeply equal |knownContext|, any subtree in
 |result|.|document| contains an `@context` property, or any URI in
 |contextValue| dereferences to a JSON-LD Context file that does not match a
 known good value or cryptographic hash, then perform the applicable action:
@@ -2363,7 +2363,7 @@ <h3>Context Validation</h3>
 If |recompact| is `true`, set |result|.|document| to the result
 of running the <a data-cite="JSON-LD11-API#compaction-algorithm">
 JSON-LD Compaction Algorithm</a> with the |inputDocument| and
-|expectedContext| as inputs. If the compaction fails, add at least one error
+|knownContext| as inputs. If the compaction fails, add at least one error
 to |result|.|errors|.
               </li>
               <li>