Interface for CDN application-oriented extension literals (e.g. dt'2026-07-27T16:00:00Z').
dt'2026-07-27T16:00:00Z'
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.