Supported Types

Scalar Types



Types Remarks HDF5 File Type
byte, int8 C char H5T_STD_I8LE
short, int16 C short H5T_STD_I16LE
int, int32 C int H5T_STD_I32LE
long, int64 C long H5T_STD_I64LE


Types Remarks HDF5 File Type
ubyte, uint8 C unsigned char H5T_STD_U8LE
ushort, uint16 C unsigned short H5T_STD_U16LE
uint, uint32 C unsigned int H5T_STD_U32LE
ulong, uint64 C unsigned long H5T_STD_U64LE

Floating-Point Numbers

Types Remarks HDF5 File Type
float, float32, single C float H5T_IEEE_F32LE
double, float64 C double H5T_IEEE_F64LE


Types Remarks HDF5 File Type
stringN Fixed-length C ASCII string of length N H5T_C_S1
string Variable-length C ASCII string HDF5 varaiable-length ASCII string

Non-Scalar Types


An array type is specified as T[a b c ... n] where T is a scalar type and a, b, c, ..., n are positive integers (dimensions). Array types of up to 32 dimensions are supported.


A compound type is specified as a comma separated list of field name and type pairs Name1,Type1,Name2,Type2,...,NameN,TypeN where Name is an ASCII string and Type is a scalar type name.

If Name contains a comma, it must be escaped with a backslash \, e.g., City\, State.