I like this. I've often had a similar issue in computational physics when handling lots of different calculation input/output files with variations in paramete

I like this. I've often had a similar issue in computational physics when handling lots of different calculation input/output files with variations in parameters. I've tended to automatically generate directory hierarchies, e.g. rc=1.0/ecut=60/kp=4,4,4/ rc=1.0/ecut=80/kp=4,4,4/ rc=2.0/ecut=60/kp=4,4,4/ rc=2.0/ecut=80/kp=4,4,4/ but some standard way of expressing it in the file name would be great, and nicer to parse out later. There are filesystems that allow metadata, but I've never seen one really being used for that purpose. You could make some associated command line tools that are equivalent to 'ls' that allow splitting/slicing the files down different parameters.