Hello, I've been evaluating OODBMS-options, and I've come across the papers describing MOA. Some dead links google gives me about it contain something about a MOA Frontend to MonetDB, while the only place it's referenced on the website is a link to Tweente-University where I couldn't find anything informative though. I'm building a system that will need to store representations of deep hierarchical structures and MOA might be an interesting option. I couldn't find anything but papers (and tests in src/from_tweente), so my question: is there a working or maybe incomplete, just any implementation of MOA I could evaluate? Or maybe actual implementations do not carry the name MOA? I'd really like to use MonetDB for this. Especially Version Five+MAL has features like coroutines, boxed variables and factories which might get very interesting for my project (once I'm comfortble with the basics/version 4 ). If there's no implementation of moa, maybe someone has an alternative suggestion on how to represent hierarchical data in MonetDB? Thanks for consideration, Johann