Define Data Items for Text Analytics

To enable text analytics for the word cloud visualization:
  1. Specify a data item as the unique row identifier for the exploration. You can choose a category, a measure, or a calculated item. The unique row identifier must have a unique value for each row of the data source.
    Tip
    To determine whether the values of a category are unique, assign the category to a bar chart with no measures. If the frequency of any value is greater than one, then the category values are not unique. To determine whether the values of a measure are unique, open the Measure Details window, and then compare the Total Rows and Distinct Count statistics. If the statistics are identical, then the measure values are unique.
    Right-click the data item in the Data pane, and then select Set as Unique Row Identifier.
    Note: A nonunique row identifier can produce unreliable results.
  2. Assign one or more categories to the Document Collection data role. Right-click a category, and then select Document Collection.
    Note: A document collection can be used in your visualizations the same way a category is used.