--- a/spec/latest/json-ld-syntax/index.html	Tue Nov 29 00:45:52 2011 -0500
+++ b/spec/latest/json-ld-syntax/index.html	Tue Nov 29 00:54:22 2011 -0500
@@ -1313,7 +1313,10 @@
 
 <p>External JSON-LD context documents MAY contain extra information located
 outside of the <code>@context</code> key, such as
-documentation about the <tref>prefix</tref>es declared in the document. It is
+documentation about the <tref>prefix</tref>es declared in the document. 
+When importing a <code>@context</code> value from an external JSON-LD context 
+document, any extra information contained outside of the
+<code>@context</code> value MUST be discarded. It is
 also RECOMMENDED that a human-readable document encoded in HTML+RDFa
 [[HTML-RDFA]] or other Linked Data compatible format is served as well to
 explain the correct usage of the JSON-LD context document.