* @throws UnknownDescriptionException
*/
private VerifierFromDescr visitFromDescr(FromDescr descr) throws UnknownDescriptionException {
VerifierFromDescr from = new VerifierFromDescr( pattern );
VerifierComponent ds = visit( descr.getDataSource() );
from.setDataSourcePath( ds.getPath() );
from.setDataSourceType( ds.getVerifierComponentType() );
from.setParentPath( rule.getPath() );
from.setParentType( rule.getVerifierComponentType() );
data.add( from );