2008-06-19: See this informative blogpost: http://motorcycleguy.blogspot.com/2008/06/if-i-had-hammer.html

2007-03-22:

A CCD schematron file and online validator can be found here:
   The schema itself is at http://informatics.mayo.edu/wiki/index.php/Continuity_of_Care_Document_%28CCD%29
   The online validator is at http://www.alschulerassociates.com/validator/
If you use the online validator, be sure to click the "CCD validation" radio button before hitting validate. 