The first release of CheckCML and supporting modules has just occurred. The code works, the documentation is still a little sketchy :) This will improve between now and Xmas.
Summary of releases:
CheckCML 1.1 - checks Experimental Data (ED) in CML
OscarData 1.1 - writes ED from the output of Oscar3 http://sourceforge.net/projects/oscar3-chem/
CheckOscar 0.1.0 - small program for taking Oscar3 XML output and writing both the ED and ED-checked files.