Topic is understood as a subject tackled by the given unit. Each unit can be tagged with more than one topics. The topics are organized in a tier system consisting of general and more specific subjects.
Below is the spreadsheet file containing the list of all the topics recognized in the current versions of the databases. These are divided into two main groups:
- the features of the SEs,
- the relationships between the SEs and humans.
The intendations serve to denote the tier of the given topic:
Download from here.