Interesting thing about the position coordinates, is that the position really needs an "epoch" metadata attribute, like "2000" or "2050", because they are relat

Interesting thing about the position coordinates, is that the position really needs an "epoch" metadata attribute, like "2000" or "2050", because they are relative to the equinox which moves over the years. So maybe the fact that this kind of thing can rear its head unexpectedly might be an argument for favoring separate elements to group fields? If that new attribute were thrown in with the other attributes of "star" it looks like it qualifies the star, but it only really qualifies the coordinates.