Clarify flattning algorithm to allow only @graph and possibly @context at the top level, not @graph with anything else.
--- a/spec/latest/json-ld-api/index.html Sun May 05 21:15:27 2013 +0200
+++ b/spec/latest/json-ld-api/index.html Sun May 05 13:08:13 2013 -0700
@@ -2811,8 +2811,8 @@
<li>If <i>context</i> is <tref>null</tref>, return <i>flattened</i>.</li>
<li>Otherwise, return the result of compacting <i>flattened</i> according the
<a href="#compaction-algorithm">Compaction algorithm</a> passing <i>context</i>
- ensuring that the compaction result uses the <code>@graph</code> keyword (or its alias)
- at the top-level, even if the context is empty or if there is only one element to
+ ensuring that the compaction result has only the <code>@graph</code> keyword (or its alias)
+ at the top-level other than <code>@context</code>, even if the context is empty or if there is only one element to
put in the <code>@graph</code> <tref>array</tref>. This ensures that the returned
document has a deterministic structure.</li>
</ol>