Hi! I have some lemmas with title, others without titles; some theorems should be numbered, others (e.g. cites from other articles) shouldn't. Is there any way to achieve this except for the following? \defineenumeration[theorem][...] \defineenumeration[exttheorem][theorem][number=no] What do you think about the following syntax: \definedescription[mydesc] And after that \startmydesc[label] \stopmydesc or \startmydesc[title=yes][label]{md:a} \stopmydesc I think that it should not be hard to implement using \doifassignment, but I don't want to work on the patch that will be never accepted upstream. P.S.: What about my patch for strc-ref that fixes \definereferenceformat[inlem][text=Lemma] ignoring text=?