I like the idea to have more parameters for content, is very useful for our company intranet.

I encounter same problem as bonnyjoy (when I click a subcategory the article itself does not display as part of that subcategory list).

Also, I would like to suggest that file system to be dynamic, so user can set the number of upload files for each article (see attachments in K2 component for example)

Thank you for sharing your work for free