SmartArt is a format of storing diagrams in Office Open XML files that was introduced in MS Office 2007. It allows to separate data from a way of presentation resulting in complex diagrams generated from bullet list entries.
Currently LibreOffice uses pre-rendered version of diagram included by Office 2010 and newer. Diagrams in Office 2007 files often appear blank.
The aim of project is to extend support for loading and laying out SmartArt diagrams. It would make LibreOffice more compatible with OOXML files and allow eventually gaining full SmartArt functionality including editing and export.
The project was started as improving VML import, but was soon changed.