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FAQ/Questions/sub-reports-and-drilldowns.md
| ... | ... | @@ -14,6 +14,10 @@ _*NOTE:* A subreport is not a special type of report! Any report can be a subrep |
| 14 | 14 | |
| 15 | 15 | _*NOTE:* This article will refer to this relationship between reports as both report-subreport as well as parent-child. The language is not technical and does not matter. You could also think of the pair relationship as from-to or high-low._ |
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| 17 | +###Blank and Null values |
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| 18 | + |
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| 19 | +Currently, Izenda subreporting does not support blank or null values. |
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| 20 | + |
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| 17 | 21 | ###Subreports on charts |
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| 19 | 23 | In addition to creating drilldowns for your main report items, you can create subreports for [[pie charts|http://wiki.izenda.us/Guides/ReportDesign/7.0-Chart-tab#7.3-Pie-Selection]] and [[bar charts|http://wiki.izenda.us/Guides/ReportDesign/7.0-Chart-tab#7.5-Bar-Selection]] as well. Currently, these only support a single key value, specified via the Label field. These will work with reports that have one drilldown key defined, but not ones with two keys defined. |