Graph objects will be used to describe all sort of graphic information usually related with atomic structures, including for example radial distribution functions and electron density maps. In particular, graphs will be used to represent the copious amount of data often provided by ab-initio and molecular mechanics calculations. Graphs can own text objects only, which will be used for captions, titles, labels, etc. The low-level engine infra-structure required to implement graph objects is fully implemented but everything else is not done yet.