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A comment on Amazon Ion – A richly-typed, self-describing, hierarchical serialization format. Parent comment

Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by infogulch on Friday November 19, 2021 @11:54PM (#29285667)
Interesting. Ids in particular are described here: https://capnproto.org/language.html#unique-ids

I wonder if giving it a name based on the hash of the definition has been explored; like Unison [0] where all code is content addressable, but for just capnproto definitions. Is there a reason not to?

[0]: https://www.unisonweb.org

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Re:Amazon Ion – A richly-typed, self-describing, hierarchica... by NavinF on Saturday November 20, 2021 @12:25AM (#29285806)
Capnp uses the name of your message, but not its full definition because that would make it impossible to extend protocols in a backwards compatible way. Without the ability to add new fields, making changes to your protocol would be impossible in large orgs.
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