Here is the patch, I built it against nightly-2004-08-30. There are 2 new options to enable categories as tags, use_category_tagging, and use_category_tagging_autocomplete, you\'ll need to add these directly to MySQL.
R. Biswas, M. Koutraki, и H. Sack. Proc. 21st International Conference on Knowledge Engineering and Knowledge Management 2018 (EKAW 2018), 2262, стр. 29-31. CEUR Workshop Proceedings, (Dezember 2018)