One comment to add to MarkA’s explanation, you can also add columns (attributes) to the view and therefore give you a broader context of your default value. If I am not mistaken, simply right clicking on the column will allow you to add the attributes. Here is a link from the forum on how to use the AB you might find useful. How to use the Attribute Browser and here Sense-making of Academic Literature Using Tinderbox - #10 by Desalegn
Hope this helps,
Tom