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http://www.openoffice.org/issues/show_bug.cgi?id=95934
------- Additional comments from ko...@openoffice.org Thu Mar 11 01:32:33 +0000
2010 -------
There is one problem with handling ODF import and export. Right now, ODF
doesn't have the concept of chart types. The chart:series element, which stores
individual data series, occurs immediately below the chart:plot-area element.
But for the mixed-type charts to be stored correctly we need to store the chart
types themselves. Ideally the element for the chart types, say,
chart:chart-type, needs to be below the chart:plot-area but the parent of the
chart:series elements.
So, instead of storing
<chart:plot-area>
...
<chart:series/>
<chart:series/>
<chart:series/>
...
</chart:plot-area>
as we currently do, we need to store it as
<chart:plot-area>
...
<chart:chart-type>
<chart:series/>
<chart:series/>
</chart:chart-type>
<chart:chart-type>
<chart:series/>
</chart:chart-type>
...
</chart:plot-area>
Using this structure is also very similar to how the chart model is structured
internally, so it only makes sense to do it this way.
This only issue with this is obviously the ODF backward compatibility &
potential delay in getting (pre-)approval from the TC. But to me, this is the
best way to approach this.
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