Data structures is a database for your app.
Objects from data structures:
By default there are following object properties:
ID. This is a unique key to the object. If you change the ID, the new object will be created.
Who. Who changed/created the object. Can't be changed from UI, API or scenario.
dateCreated. The date and time when the object was created. Can't be changed from UI, API or scenario.
dateChanged. The date and time when the object was changed. Can't be changed from UI, API or scenario.
You can add custom fields (properties) and groups for your data structure. Each field have to be a type from the list.
Configuring the fields of a structure you can setup the visible name. It will be displayed in objects near links to that structure and in selects in form.