The Language Guide describes the "string" scalar data type as "A
string must always contain UTF-8 encoded or 7-bit ASCII text." does
this include the ASCII control character below 0x20? At least XML does
not allow these characters (but three of them) - there is no way to
serialize such a string in XML (see 
for allowed Unicode codes).

I also like to know whether the float and double types represent the
floating point number as defined by IEEE 754 including its special
values signaling NaN, quiet NaN, -0.0, -Inf, +Inf or do this values
get lost on serialization?

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