...
To add concepts to a working set, click on 
button, which adds a new row. You can then enter a concept in the field that is created; there is autocomplete functionality to help you find the concept you are looking for(only showing concepts you have access to).
To remove the concept and replace it with a different one, click the circular arrow icon. To delete a row completely, click the red X icon.
...
- You must enter a name for each attribute added. Requirements for names follow typical database naming conventions (case insensitive, must start with a letter, can be followed by any combination of letters, numbers, and underscores, no white spaces). Attribute names must be unique.
- For each attribute, you can specify int, float, or string as the type. The values entered in a field will be validated against this type.
...