Update expanded term grammar to MUST NOT contain any other keys, rather than SHOULD NOT.
--- a/spec/latest/json-ld-syntax/index.html Sat Aug 18 12:04:46 2012 -0700
+++ b/spec/latest/json-ld-syntax/index.html Sat Aug 18 12:07:52 2012 -0700
@@ -2770,7 +2770,7 @@
<span class="issue">It is not clear what the last sentence is attempting to convey</span>.</p>
<p>An <tref>expanded term definition</tref> is composed of zero or more keys from <code>@id</code>,
<code>@type</code>, <code>@language</code> or <code>@container</code>. An
- <tref>expanded term definition</tref> SHOULD NOT contain any other keys. <span class="issue">SHOULD NOT vs. MUST NOT - it should probably be MUST NOT</span></p>
+ <tref>expanded term definition</tref> MUST NOT contain any other keys.</p>
<p>If the <tref>term</tref> definition does not have the form of <tref>compact IRI</tref> or <tref>absolute IRI</tref>,
the <tref>JSON object</tref> MUST include the <code>@id</code> <tref>keyword</tref>.</p>
<p>If the <tref>expanded term definition</tref> contains the <code>@id</code> <tref>keyword</tref>,