| Attributes | 
| Name | Required | Request-time | Type | Description | 
| bean | true | false | edu.sdsc.inca.consumer.DistributionBean | a bean containing a CategoryDataset representing a distribution | 
| col | false | false | java.lang.Long | the column index of the count value | 
| colValue | false | false | java.lang.String | a value in the distribution | 
| row | false | false | java.lang.Long | the row index of the count value | 
| rowValue | false | false | java.lang.String | the row description of the count value | 
| var | true | false | java.lang.String | name of the exported scoped variable to hold the count value |