https://my.domain/.well-known/distributed/recommended.list
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https://friend1.domain/ Blogs about electronics
https://friend2.domain/ Blogs about knitting
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https://friend1.domain/.well-known/distributed/recommended.list
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https://my.domain/ Blogs about hacking SBCs
https://friend3.domain/ Nice website
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And you could write a bot that would walk through this, avoid loops, and construct a graph, and give you a search or RSS. RSS feeds could be also discoverable. https://my.domain/.well-known/distributed/my-feeds.txt
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https://my.domain/.well-known/distributed/feed-blog.xml My blog posts
https://my.domain/.well-known/distributed/feed-announce.xml My announcements
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Just something that helps with discovery of interesting content in a decentralized way, outside of search engines, aggregators, HTML pages, etc. You would be able to select search distnace from certain domains, blacklist domains, etc.And if you assume person == domain, this would build an open, distributed, searchable social graph (of people with domains :) and something to say). You'd be able to see weights of domains by how many people recommend them, etc.
There would be no central storage for the graph.