New in version 2.21bh is the replacement of all level strings by a uniform system developed for the the uadb database. The following is reproduced from the uadb manual and describes the labeling system.
While level strings from any coupling scheme can be stored and retrieved from uaDB, currently it only supports searching for -coupled level strings. In order to guarantee uniqueness, level strings entered into the database must conform to the rules outlined in this appendix.
All states must have a configuration. Term-averaged or level-resolved states must also include a term string and level-resolved states must specify . The rules for each part follow.