Q: is there any way to augment the functions that are available in queries? I'd like to be able to e.g. query for keyword values based on their namespace, but it doesn't look like there are functions to stringify or retrieve the namespace from a keyword in the standard library.
There are no userspace extension points currently, so adding such things would have to go in as PRs for the time being. Feel free to open issues for anything you feel is needed. For anything that's clearly beyond the scope of what a standard library should offer though we'll eventually have to support wasm or something. TBD.