[IE, plot] ship with jqplot'excanvas version (include http://code.google.com/p/explorercanvas/issues/detail?id=82 for instance)
ifnotrql('CWConstraintType X WHERE X name "RQLUniqueConstraint"',ask_confirm=False):rql('INSERT CWConstraintType X: X name "RQLUniqueConstraint"',ask_confirm=False)