Extension for Hexadecimal byte strings: h'01020304' or h"01020304".
h'01020304'
h"01020304"
The extension identifier, e.g., "dt", "ip", "h", "b64", "hash", "b1", "t1", "float".
Formats a DataItem into CDN extension syntax, or returns null if not applicable.
null
Parses the string content of an extension literal into a DataItem.