If there is a *.rf attribute with id which is not present in the document, delete this id. The current implementation checks only a/lex.rf and a/aux.rf.
Such situation should never happen, but if we have invalid data on the input, this block may be handy.
Martin Popel <email@example.com>
Copyright © 2015 by Institute of Formal and Applied Linguistics, Charles University in Prague This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.