True, I can also imagine different directions. I think it could be useful to have several categories of tag - topics: science, art, politics, etc. - purpose:

True, I can also imagine different directions. I think it could be useful to have several categories of tag - topics: science, art, politics, etc. - purpose: news, opinion, explanation, introduction, humor, etc. (for example, anything from producthunt.com is introduction) - format: text, audio, video I think it's good to have wide coverage, because it means much better filtering/sorting, both for manual and automatic.