Hello,
In the Google Reader API (implemented by FreshRSS), there is the concept of tags, which would be nice to support in Readrops. An article may appear in a feed as well as in multiple tags (and potentially also in the "read later" / favourite list).

Here is a screenshot from News+ as an illustration:

Do not hesitate to ask if if you need any additional documentation / examples.

Related to #53

Alkarex, from FreshRSS