--- a/ttml2/spec/ttml2.xml	Sat Sep 20 19:54:14 2014 -0600
+++ b/ttml2/spec/ttml2.xml	Sun Sep 21 04:40:49 2014 -0600
@@ -1478,6 +1478,11 @@
 <note role="clarification">
 <p>If a reference to an element type is used in this specification and the name
 of the element type is not namespace qualified, then the TT Namespace applies.</p>
+<p>If a reference to an attribute is used in this specification and the name
+of the attribute is not namespace qualified, then the attribute is implicitly qualified by
+the element type with which it is used. That is, the attribute resides in the so-called
+<loc href="http://www.w3.org/TR/1999/REC-xml-names-19990114/#ns-breakdown"><emph>per-element-type namespace partition</emph></loc>
+<bibref ref="nsoriginal"/>, the members of which are interpreted in accordance with the definition of the element type on which they appear.</p>
 <p>For certain namespaces defined above, the default prefix
 is specified as <emph>none</emph> if no XML vocabulary is defined in
 the namespace by this specification (nor expected to be defined in a
@@ -14683,6 +14688,11 @@
 interface &ndash; Part 5: Multimedia description schemes</titleref>,
 International Organization for Standardization (ISO).
 </bibl>
+<bibl id="nsoriginal" key="NSOriginal">Tim Bray, et al.
+<titleref href="http://www.w3.org/TR/1999/REC-xml-names-19990114/">Namespaces
+in XML</titleref>, W3C Recommendation, 14 January 1999. (See
+<xspecref href="http://www.w3.org/TR/1999/REC-xml-names-19990114/">http://www.w3.org/TR/1999/REC-xml-names-19990114/</xspecref>.)
+</bibl>
 <bibl id="nsstate" key="NSState">Norman Walsh, Ed.,
 <titleref
 href="http://www.w3.org/2001/tag/doc/namespaceState-2006-01-09.html">The Disposition