What is the native STATISTICA graphics format?

Unlike other graphics formats such as metafiles and bitmaps, the native STATISTICA graphics file format (file name extension *.stg) not only stores the "image" of the current graph but also all information necessary to continue graph customization or graphical data analysis (including all data represented in the graph, links to data, fitted equations, embedded graphs and artwork, links to graphs and artwork, etc.). Graphs stored in this format can be opened later (in STATISTICA) allowing you to continue the graphical data analysis or graph customization (e.g., fit equations, add or merge new data series, etc.). Graphs saved in this format can also be dynamically linked to documents of other Windows applications using OLE conventions.