hexBinary data type
The xs:hexBinary data type represents hex-encoded binary data. Derived from data type xdt:anyAtomicType.
The lexical form of xs:hexBinary is a sequence of characters
in which each binary octet is represented by two hexadecimal digits.
For example, the following form is a hex encoding for the 16-bit integer
4023, which has a binary representation of 111110110111: 0FB7.