A few ideas about tagging, metadata, concept maps, etc

My impression was that the system implemented on this forum makes assembling such collections easy.

All you need to do is make a list, and the suttas will be accessible. Of course, more elaborate annotation is possible:

But if I want to make a list of suttas on Topic X, I can just type:
MN3, AN3.45, SN2.1, DN4, …
Those suttas can then be accessed, and there is a link back from SuttaCentral to the post.

The hard work is, of course, identifying the suttas.

Of course, it might be nice to have the collections on the SuttaCentral site itself, rather than Discourse, but I presume that converting posts such as the above would be relatively easy.