Version numbers are related to I³S Classic and I³S Manta. So even though I³S Contour is new, the current version is version 3.0. Most of the underlying software for metadata and user interfacing is an update of existing software from I³S Manta v2.1, hence the v3.0 version of I³S Contour.

All major releases (of Classic, Manta and Contour) will have the same and latest features and improvements (if applicable). Usually new features or improvements are developped upon a specific request or if certain bugs are noticed in a particular version of I³S. These are all taken into account for all versions of I³S in the next major release.