# Pluggable Transport Naming Pluggable Transport names serve as unique identifiers, and every PT MUST have a unique name. PT names MUST be valid C identifiers. PT names MUST begin with a letter or underscore, and the remaining characters MUST be ASCII letters, numbers or underscores. No length limit is imposted. PT names MUST satisfy the regular expression "`[a-zA-Z_][a-zA-Z0-9_]*`".