For definition list of names values for the fields (in case you need to do some advanced magic with them), please refer to the dev site overview.
Some of the field types have some more documentation including examples, etc:
- Enable or disable what field types are available in Tiki
- To Access
- From the Trackers page, click the Field Types tab.
List via structure
Here is the source code for all the tracker field types: https://gitlab.com/tikiwiki/tiki/-/tree/master/lib/core/Tracker/Field