SDLBinary

node.values[0].kind == SDLType.float_;
node.values[0].kind == SDLFloat;

Defined types (have aliases in form SDLTypeName, i.e SDLBinary or SDLDateTime):

Void null_;
string text;
immutable(ubyte)[] binary;
int int_;
long long_;
long[2] decimal;
float float_;
double double_;
bool bool_;
SysTime dateTime;
Date date;
Duration duration;