designating letters of the alphabet, including modified letters, ligatured letters and contractions, which stand for letters 

a contraction which represents a complete word 

initiates a mode which extends over the next letters- sequence in the case of the capitals indicator or over the next symbols-sequence in the case of other indicators 

including dot 1 and/or dot 4 

transcribed without contractions (also referred to as grade 1 braille) 

a section of text normally read as a unit (a single paragraph, a single heading at any level, a single item in a list or outline, a stanza of a poem, or other comparable unit), but not "pages" or "lines" in the physical sense that are created simply as an accident of print formatting 

a braille sign which marks the end of a mode 

an unbroken string of braille signs, whether alphabetic or non-alphabetic, preceded and followed by space (also referred to as symbols-word) 

designating a braille character containing dots in both the top and bottom rows and in both the left and right columns of the braille cell, which therefore is physically unambiguous 

designating contractions (other than alphabetic wordsigns) containing dots in both the top and bottom rows and in both the left and right columns of the braille cell