The pptx chart data source been saved in pptx file package as a separate file in xlsx format or binary format, and zipped with pptx file together. But there is data cache saved with chart description in chart.xml. After this part of implementation, the chart could be imported and will show the same with originally in MS Office. For the basic scenario, the pptx chart can be imported correctly in Aoo. Detail is in the attachment.
2012-09-05 tanmgeng