I'm always a bit thrown when a primary navigation item doesn't link to a page. However I do sometimes see primary navigation items used as category headings for a drop down menus.
- Should primary navigation items always link to page?
- If they do link to a pages is it OK if those pages are just a section landing pages or summaries of the pages below them, or should they have unique content?
- If they do not link to pages, what cues do you give to the user to set that expectation?