Make it clear what text encoding string values are expected to be in.

[chirino]

I got feeling it's likely UTF8, but would be nice if the spec made that clear.

[PiotrSikora]

Yes, those should be documented.

But which specific values are you referring to? Specifically, HTTP field values are not UTF-8.

[chirino]

every field described as char * and how the keys/values of the map Serialization section are encoded too.

[chirino]

if they are not encoded, then state it's a byte[]