Dear all, When defining abbreviations through \definesynonyms, if the abbreviation contains a digit then it seems that the built-in macro is not recognized: in the example below the command \EEG is recognized, whereas \M2 or \Y2K are not. Is there a way around this difficulty? Or should one use a definition like \definesynonyms[abbreviation][abbreviations][\inshort][\infull] and then use everywhere \inshort{Y2K}? Many thanks in advance, with my best regards: OK %%%% begin example-abbr.tex \definesynonyms[abbreviation][abbreviations][\infull] \starttext \abbreviation{EEG} {Electroencephalogram} \abbreviation{ERP} {Event-Related Potentials} \abbreviation{M2}{Master 2nd year} \abbreviation{Y2K}{Year 2000} Test inshort working: \EEG, \ERP, Test not working \M2, \Y2K Test infull: \infull{EEG}, \infull{ERP}, \infull{M2} \completelistofabbreviations \stoptext %%%% end example-abbr.tex