Joel VanderWerf wrote: > ADL sounds interesting, but google doesn't know much about it. Is it > published, or can you give us some hints or examples? No. I hadn't published specs before. The only document I have is a little dated, but you'll probably it interesting anyhow: <http://polyplex.org/cjh/software/adl>. I'm still playing with the semantics of relationships, to encapsulate the features of ORM. I haven't found a good way to indicate mandation yet either - earlier work didn't need it but ORM does. This version also doesn't talk about Method variables, it's purely for static data modelling. I look forward to your comments. Clifford Heath.