We shouldn't assume prov-json is too stable.

[mccalluc]

More like tech-debt than a bug, but we shouldn't assume too much about the stability of prov-json. It's a serialization of a much more flexible datastructure, and while I don't expect it to change, tying ourselves too tightly too it is like parsing xml with regexes. The easiest thing to point at are the colon-prefixes: These could be changed, without changing the semantics... but it would break us.

Some options:

• See if some other part of the response has the information we need. (best?)
• Propose additions to response which would provide what we need.
• Pull in a real prov-json library. (worst?)

cc @john-conroy

[john-conroy]

I think we can close this?