For example:

* obsidian://adv-uri?vault=PKM&filepath=Folder/text.md, will open a markdown text file in obsidian

* itms-apps://search.itunes.apple.com/WebObjects/MZSearch.woa/wa/search?media=software&term=SearchTerm

More examples: https://github.com/SKaplanOfficial/macOS-URL-Schemes-for-macOS-Applications