[ttml1] (1) add note elaborating use of new whole number version convention; (2) elaborate note about short name convention
--- a/ttml1/spec/ttml1.xml Thu Sep 19 14:35:12 2013 -0600
+++ b/ttml1/spec/ttml1.xml Thu Sep 19 14:51:05 2013 -0600
@@ -157,10 +157,19 @@
external multimedia integration technology, such as SMIL.</p>
</note>
<note role="historical">
+<p>In the first edition of this specification, the version number <code>1.0</code> was
+used to refer to this version of TTML. In this second edition, this version number is simplified
+to <code>1</code> as a result of a determination to call the next (future) version <code>2</code>
+instead of <code>1.1</code>.</p>
+</note>
+<note role="historical">
<p>In previous drafts of this specification, TTML was referred to as DFXP (Distribution
Format Exchange Profile). This latter term is retained for historical reasons in
certain contexts, such as profile names and designators, and the short name
-<code>ttaf1-dfxp</code> used in older URLs to refer to this specification.</p>
+<code>ttaf1-dfxp</code> used in older URLs to refer to this specification. Starting in
+this edition of the first version of TTML, the short name <code>ttml1</code> will be
+used, and subsequent versions of TTML are expected to use short names of
+<code>ttml2</code>, etc., with whole integer version numbers.</p>
</note>
<div2 id="model">
<head>System Model</head>