Thank you! I'm writing an APL-lineage language right now (really, APL+Prolog+Lustre "lineage") and hadn't come across this paper. I found an HTML version here:

Thank you! I'm writing an APL-lineage language right now (really, APL+Prolog+Lustre "lineage") and hadn't come across this paper. I found an HTML version here: https://www.jsoftware.com/papers/J1990.htm https://www.jsoftware.com/papers/J1990.htm