What is Ontology Learning?

[BradKML]

This repo was recommended to me recently, and I find it quite interesting about "ontology." Is it similar to knowledge graphs but for relationships/taxonomy between "things" (especially out-of-vocabulary or novel ones)? https://github.com/HamedBabaei/LLMs4OL

If this can be used for PKMs or personal wikis, it would be great, since people will be able to have their research knowledge organized into something that is easier for machine queries https://github.com/siyuan-note/siyuan https://github.com/jaar23/nb-assistant

[XavierRolex]

Hey @BradKML, Ontology learning is the process of automatically or semi-automatically building ontologies from data. It is like the schema or structure that underlies a knowledge graph. So yes, they are closely related to knowledge graphs, but focus more on schema discovery and taxonomy extraction from text or data. In other words, ontology learning helps create the schema or backbone of a knowledge graph.
I believe you are trying to ask if you can combine PKM & Ontology, then yes, you can.

[BradKML]

Are there ways to start doing "hobbyist ontology" with recreational documents and knowledge bases of niche topics?