The Attributes Panel lists in alphabetical order all the EDE Attributes, which are represented as column headers in the current EDE View. In case where multiple Column headers with the same name exist in the EDE View, the respective Attribute will be listed once in the Attributes column. Any EDE Expressions which are already created are also part of the Attributes list. EDE Expressions that are not given a unique name will be named: Expression with a number that increments sequentially with each expression. Example: Expression1, Expression 2, Expression 3.
Double clicking an Attribute places it in the Expression Box in square brackets, highlighted in blue.