It just threw me a bit because these are new attributes of the GIFTI element, which seems to amount to a small change in the GIFTI format.

So do we need to add such attributes to the DTD, or perhaps mention them in the Format doc? From a programming point of view, they should be considered valid attributes. As of now, they are considered invalid, and gifticlib whines.

Keeping a list of valid non-gifti attributes is okay with me, which seems appropriate for these. I would just prefer a fixed list of what is acceptable.

- rick