This a great topic! I also developed a canvas called Thematic Space Canvas and applied it to Knowledge Discovery Activity.

And, I wrote a book (in draft) about it.

Knowledge Discovery:

Developing Tacit Knowledge with Thematic Space Canvas

https://medium.com/call4/knowledge-discovery-4092d0695ad4?sk=d3f694ed99c1e454d3a2b62b2b036e23

The primary theoretical resource is Activity Theory. I don't start with the concept of "Knowledge Discovery", but the "Knowledge Discovery Activity".