Question: Is there a spec to define the comment?

[yanganto]

Hi, here

This is awesome to make the data readable and also typed in a small size.

It is nice to providing comment features in a readable data format.

Is there a plan to define the comment symbols, such as //.

Thanks.

[yasammez]

I suppose you mean within the textual representation? That can be done; however, it wouldn't make much sense to include comments in the wire format and thus they would get lost after a roundtrip.

[yanganto]

Yup, There may be one reason for allowing to writing a comment that some people using yaml instead of json. If you take this into consideration will be nice, and this just a suggestion. :)