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Subject: Are all charts always backed by a table?



For accessibility purposes the AccSC needs to know if all ODF charts are *always* backed by a table.  (Tables are accessible and easier to navigate and interpret.)  Due to the use of the word "may" in sections 10.2 and 10.3 of the spec, it's not clear that all charts are *always" backed by a table.  Could someone please clarify this?  Does the text need to be touched up?

10.2 Introduction to Chart Documents
Chart documents are always contained within other XML documents. There are two types of chart container documents:
10.3 <chart:chart>
The <chart:chart>  element represents an entire chart, including titles, a legend, and the graphical object that visualizes the underlying data called the plot area. The data underlying the chart is represented by a table element. This element *may also exist* for embedded charts that get the data from the container document. In that case the chart can be rendered without getting the data from the container document.

Thanks,
Pete Brunet
                                                                         

IBM Accessibility Architecture and Development
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