Hi there!
I have a tough understanding what to do:

I need to categorize a product by it’s keywords.
I have a several “Topics”, for example: “New Technologies”, “Health”.
Each of those “Topics” have several “Subtopics”, for example: "New Technologies => “Internet of Things (IoT)”, “New Technologies => 3-D Printing”

There are in average about 250 categorized products in each “Subtopic”.
I went ahead and grabbed all keywords from already categorized products, and made a list for each “Subtopic” with keywords and their frequency, for example: %{“keyword”: “stereolithography”, “uniqueCount”: 8, “totalCount”: 17}

So, long story short: I have a bunch of lists with keywords that I need to somehow “measure” and “rank” them.
I guess my next step should be creating a keywords for each “Topic” from its “Subtopic”'s combine “dictionary” of all “important” keywords… I have no idea how to do it. The keywords are overlapping among “Subtopics” but I still need to “measure” them somehow…
Is there any “cool and easy” Elixir library that can be useful in my case?
Please share any tips!