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Per https://en.wikipedia.org/wiki/Country_code_top-level_domain

Imagine locally observed consensus and self-categorization using locality specific tags based on reverse TLD for that region.

For example: An article relevant to Appleton, WI USA might be tagged us.wi.appleton. An article relevant to Nankai District in Tianjin China may be tagged cn.tj.nankai

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    Hmm… my lobste.rs inexperience is showing.

    I hadn’t realized that all tags are by default visible. Having tags for each city on the globe would not work well.

    :/