Type alias NumericDType

indicates the name of a numeric type.
the collection of possible valid numeric types is:

• "u1", "u2", "u4", "u8", "i1", "i2", "i4", "i8", "f4", "f8", "u1c"

the first character specifies the format:

• u = unsigned integer
• i = signed integer
• f = float IEEE-754

the second character specifies the byte-size:

• 1 = one byte
• 2 = two bytes (short)
• 4 = four bytes (word)
• 8 = eight bytes (long)