I’m working on an adnominal possession library, and I need to implement lexical rules that inflect the possessor or possessum. In my sandbox version of the questionnaire, I have an adnominal possession subpage: http://matrix.ling.washington.edu/ekayen/matrix.cgi?subpage=adnom-poss. When the user indicates on this page that one of their possessive strategies involves some affix, a ‘possessor’ or ‘possessum’ pseudofeature is created on the morphology page. The idea is that when a rule on the morphology page is marked (for example) [POSSESSOR plus], the matrix will generate the appropriate possessor-marking lexical rule. However, there’s also a lot of info that’s entered on the adnominal possession page that affects what the rule will look like. In general, I’d like to do most of the work within my own library file, but I imagine I can’t do all of it there. I wanted to see if people who have written libraries that added lexical rules (possibly Chris?) have developed a good strategy for what goes in morphotactics.py vs. what goes in their own library.