== TSDL identifier
Many barectf YAML objects require that a given string key or value
-be a valid TSDL identifier.
+be a valid TSDL (Trace Stream Description Language) identifier.
As per https://diamon.org/ctf/v1.8.3/[CTF{nbsp}1.8.3], a valid TSDL
identifier is any valid C{nbsp}identifier which is __not__ one of: