PSON is a variant of JSON which puppet uses for serializing data to transmit across the network or store on disk.
JSON requires that the serialized form is valid unicode (usually UTF-8).
A PSON string is a sequence of 8-bit ASCII encoded data. It must start and end with “(ASCII 0x22) characters.
Puppet uses the MIME types “pson” and “text/pson” to refer to PSON.