Each post in Wikipedia can be assigned one or more categories. To a great extent, you can consider this information as internal to Wikipedia. Nevertheless, it may help to focus your filtering.
Here are some sample values for wikipedia.categories for a single Wikipedia page:
- Living_people, English_television_actors
Filter for Wikipedia posts that include "beverage" in their category string:
wikipedia.categories contains "beverage"
Filter for Wikipedia posts with a specified category string:
wikipedia.categories == "People_from_London"
Target service: Wikipedia
Always exists: No