cd.memo = ch.changed(cd.memo,updt.memo);
cd.operation = ch.changed(cd.operation,updt.operation);
cd.updated = ch.changed(cd.updated,updt.updated==null?new Date():updt.updated);
cd.memo = ch.changed(cd.memo,updt.memo);
cd.operation = ch.changed(cd.operation,updt.operation);
cd.updated = ch.changed(cd.updated,updt.updated==null?new Date():updt.updated);