Occasionally it is not possible to transcribe material into braille exactly as it appears in print. When this happens, a note is written by the transcriber explaining the change from print format or conveying information necessary for the clear understanding of the material. This transcriber's note (TN) may be added to a braille transcription either at the beginning of a volume or imbedded in the text.
When a situation that needs explanation occurs only once, or very seldom, the transcriber's note is imbedded at the appropriate site in the text. Each complete note, regardless of the number of paragraphs it may contain, is preceded and followed, unspaced, by the 2-cell transcriber's note symbol (dots 6, 3). Use paragraph format with each note starting in cell 7 with runover lines starting in cell 5. A blank line should not be left either before or after a TN unless required by other braille formats. [BF Rule 1.7]
For clarity, an opening transcriber's note symbol is never placed in contact with a whole-word, lower-sign contraction. When a TN symbol and a lower-sign contraction fall consecutively, the lower-sign word must be spelled out. When a transcriber's note symbol is used in a volume, it must be listed on a special symbols page (to be studied later.)
For a special format that needs explanation, stop the transcription immediately before the occurrence and insert a transcriber's note. Example:
If a term or print sign needs identification or description, place the TN immediately following it. Example:
In the following music a caesura // is used to indicate a breathing point.
When a special situation that needs explanation occurs more than once within a particular section of a text, only one transcriber's note is needed.When it is necessary to explain that the braille version differs from the print in a fundamental way throughout an entire book this notice is placed on a transcriber's notes page at the beginning of the braille volume (to be studied later).