[ `About of abouts (* current proof *)
| `Check of string (* term *)
| `Cic of Cic.term * Cic.metasenv
+ | `Development of string
| `Dir of string (* "directory" in cic uris namespace *)
| `Metadata of [ `Deps of [`Fwd | `Back] * UriManager.uri ]
| `Uri of UriManager.uri (* cic object uri *)
| `About `Coercions -> "about:coercions"
| `Check _ -> "check:"
| `Cic (_, _) -> "term:"
+ | `Development d -> "devel:/" ^ d
| `Dir uri -> uri
| `Metadata meta ->
"metadata:/" ^