Also skip @base key.
--- a/spec/latest/json-ld-api/index.html Mon Mar 04 21:28:43 2013 -0500
+++ b/spec/latest/json-ld-api/index.html Mon Mar 04 21:32:35 2013 -0500
@@ -957,7 +957,8 @@
track of whether or not a <tref>term</tref> has already been defined
or currently being defined during recursion.</li>
<li>For each <em>key</em>-<em>value</em> pair in <em>context</em> where
- <em>key</em> is not <code>@vocab</code> or <code>@language</code>, invoke the
+ <em>key</em> is not <code>@base</code>, <code>@vocab</code>, or
+ <code>@language</code>, invoke the
<a href="#create-term-definition">Create Term Definition algorithm</a>,
passing <em>result</em> for <tref>active context</tref>,
<em>context</em> for <tref>local context</tref>, <em>key</em>,