Would like to be able to count a simple QL reference as a TagRef, or at least get such references

Huh. Okay, this isn't actually a bug -- technically, it's a Misunderstanding. But I'm going to leave it open as a Feature request, and will think about it.

The thing is, what you've done isn't at all what a Tag means in Querki. Tag is a Type, and is just as formal as anything else -- you usually create a Tag Set Property (which is basically a set of Names), and any value you put into there counts as a "Tag". That's what _tagRefs looks for. (I'll have to make sure the documentation illustrates this.)

What you're trying to get at is very different -- basically, to dynamically list all of the references to this Thing from any QL expression. That is not at all easy to do, and can't be done feasibly in the current system -- it would require parsing all QL expressions in the entire Space on the fly, and that's simply too expensive.

That said, I can see the desireability of such a feature, so I'm going to put it on the table for future consideration. If we get to the point where we are maintaining a more detailed internal reference map (which is plausible after we get to Querki Explorer, in the second half of 2014), and especially if we pre-parse all of the QL at Space load time (which would be expensive upfront, but would have efficiency benefits), it might be possible to do something like this with reasonable cost...