It is not possible to distinguish primitive types

[anti-social]

I parse yaml to YamlElement and I need a way to differ numbers from strings:

a: 1
b: "1"

In kotlinx.serialization there is an isString property which can be taken into account.

Either there could be special wrappers to all supported data types.

[Him188]

In JSON, unquoted values have their semantics, false means exactly the boolean value false, but in YAML, I think there is no such specification (viz. there are just strings)? You can still have a: foo unquoted.

[anti-social]

So it would be nice to have a flag how a scalar node was represented

[anti-social]

I's really interesting problem.

What do you think about a recommendation to use a core scheme by default?

https://yaml.org/spec/1.2.2/#103-core-schema

The Core schema is an extension of the JSON schema, allowing for more human-readable presentation of the same types. This is the recommended default schema that YAML processor should use unless instructed otherwise.

All the parsers that I've used in other languages use the core schema, I think.

[Him188]

You are right. I agree we should use the Core schema.