A new protocol has been adopted in the Virtual Ob- servatory to share and access data related to the Solar System in the broadest sense. This relies on the Table Access Protocol (TAP) standard and a specific vocab- ulary called EPNCore used to describe quantities of interest for Planetary Science, heliophysics, exoplan- ets, and related laboratory measurements. It is de- scribed here, together with possible usages beyond the basic access to public databases.