How to add a new event category
The answer is semantic. Event types are metadata. Each content type in Plone has a list of metadata patterned after a subset of the Dublin Core standards. The Dublin Core metadata term called "subject" corresponds to "the topic of the content of the resource." In the case of a calendar event "resource", the event type is the Dublin Core "subject."
To add your own event type:
- Go to the ZMI for the Plone site (through plone_control_panel),
- Click on the portal_metadata tool,
- Click on the Elements tab,
- Click on the Subject element,
- You will see Element Metadata Policy title, click on the subject link
- Find the conten type event.
- Add your new event types, one per line, to the Vocabulary list of the policy,
- Click on the Update button for the policy.
Now, go back to your Plone site and add a new event. You should see your new event categories.