2.1.968 Part 1 Section 20.20, chart:error-upper-limit

a.   The standard defines the attribute chart:error-upper-limit

Excel 2013 supports this attribute uses this attribute for the <style-chart-properties-attlist> element of the <chart:plot-area> and <chart:series> elements when the chart is not three dimensional and the series type is "line", "area", "scatter", "bar", "stock", or "bubble".