I have also been researching this heavily recently. I am more concerned with Keyphrase Extraction rather than Topics. Topics I view as being more generalised ac

I have also been researching this heavily recently. I am more concerned with Keyphrase Extraction rather than Topics. Topics I view as being more generalised across documents where as Keyphrase Extraction is concerned with the phrases or words that best represent each document which better suits my use case. Moz have a good write up of their Keyphrase Extract pipeline here. https://moz.com/devblog/machine-learning-approach-to-keyword-extraction/ https://moz.com/devblog/machine-learning-approach-to-keyword... I would be happy to discuss this with you more if you would like.