- W3C VISS specification (master branch) - version 1 refers to VSS (v1).
- W3C VISS, version 2 (under development), which primarily aims to extend the access method to use REST based protocols. It also refers to VSS as a data description model, and the master branch of VSS is undergoing changes accordingly. Master is now used as the "version 2" branch of VSS.
- There is no branch maintainer (and hence actually no maintenance branch created) for VSS version 1.
- Early V(I)SS to REST proposal: V(I)SS_to_REST_proposal_v1.0.pdf by Gunnar Andersson, (presented to W3C F2F meeting in April, 2018).