Transcriptions are ``case sensitive'' in that case must be used to correctly encode information in the transcription, but the normal case rules of the language will not generally apply. It is recommended to use lower case only with no capitalisation of sentence initial text.
Note: This differs from the ATIS convention which did not distinguish the English indefinite article ``a'' from the spelled letter ``a''.
The only exceptions to this rule concern proper nouns and spellings. If the transcriber is certain that a word is a proper noun, the word should be capitalised.
Note: Per language decisions must be made concerning the treatment of compound proper nouns like `Stephenson Way', `mister Giscard d'Estaing', etc. These should be documented in each case.