| http://www.w3.org/ns/prov#value | - In A Round Chart in a Square Hole - Stacked Bar Charts I described a particular type of bar chart known as a stacked bar chart, that may be used like a pie chart to display proportional data.Bar charts can also be used as a far more general type of graphical display.Read the following section from the OpenLearn unit More working with charts, graphs and tables: Bar ChartsWhat sort of data can bar c
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