categories property

List<Category> categories

It has one optional attribute, domain, a string that identifies a categorization taxonomy. The value of the element is a forward-slash-separated string that identifies a hierarchic location in the indicated taxonomy. Processors may establish conventions for the interpretation of categories.

rss ref: https://cyber.harvard.edu/rss/rss.html#ltcategorygtSubelementOfLtitemgt

Implementation

final List<Category> categories = [];