paleolimbot commented on issue #25078:
URL: https://github.com/apache/arrow/issues/25078#issuecomment-2605748640
> What do you mean by "flatten everything into one object"?
In integration test JSON (which vaguely follows flatbuffers), you have:
```json
{
"name" : "name_of_the_field",
"nullable" : true,
"type" : {
"name" : "duration",
"unit" : "MILLISECOND"
}
}
```
The C Data interface puts that all in one object conceptually:
```json
{
"format": "tDm",
"name": "name_of_the_field",
"flags": 2
}
```
And you could do something in the middle, although I'm not personally keen
to come up with all the rules/names needed to define all these (e.g.,
"milliseconds"? "milis"? "ms"? "m"?).
```json
{
"format": "duration",
"timeUnit": "milliseconds",
"name": "name_of_the_field",
"nullable": true
}
```
The least effort spec development and implementation-wise is (probably) a
literal translation of the C data interface. It might be worth re-floating that
idea with the possibility of allowing future substitutions for readability in
the event anybody ends up caring about that (e.g., `"format"` could accept a
JSON object like `{"duration": {"timeUnit": "ms"}}`.
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