Default value of rotationAngle is 0.
See discussion at:
http://lists.w3.org/Archives/Public/public-webevents/2011AprJun/0020.html
--- a/touchevents.html Tue Apr 05 12:53:53 2011 -0400
+++ b/touchevents.html Wed Apr 06 00:08:16 2011 -0700
@@ -22,7 +22,7 @@
// subtitle : "an excellent document",
// if you wish the publication date to be other than today, set this
- publishDate: "2011-04-01",
+ publishDate: "2011-04-05",
// if the specification's copyright date is a range of years, specify
// the start date here:
@@ -173,7 +173,7 @@
<dt>readonly attribute float rotationAngle</dt>
<dd>
- the angle (in degrees) that the ellipse described by <a>radiusX</a> and <a>radiusY</a> is rotated clockwise about its center. The value must be in the range <code>[0, 90)</code>. If the ellipse described by <a>radiusX</a> and <a>radiusY</a> is circular, then <a>rotationAngle</a> must be <code>0</code>.
+ the angle (in degrees) that the ellipse described by <a>radiusX</a> and <a>radiusY</a> is rotated clockwise about its center; <code>0</code> if no value is known. The value must be in the range <code>[0, 90)</code>. If the ellipse described by <a>radiusX</a> and <a>radiusY</a> is circular, then <a>rotationAngle</a> must be <code>0</code>.
</dd>
<dt>readonly attribute float force</dt>