During more than half year I have tried to use note-taking tool thinkery.me
The tool enabled me easy select extracts (snippets) and to save them with semantic enrichment.
I have used not tags list but tags chains, e.g. business-marketing-content- tool or search-versus-discovery
Now the team is discussing future of the app
They try to find solution about financing the app creation and further developement.
I recommend to try this app.