@rufuspollock I'm not proposing that a datapackage maintainer seek out all datastores and add hints for every single column. But I do think datapackage maintainers are the closest to the datapackage and are more likely to have actually uploaded the package to a data store (for now). As a community user of a data package, I'd be able to make a Pull Request suggesting a mapping set for the datastore I use. Also, provide a way for users to override the suggested mapping for a type of datastore with their own. Thoughts?