Word Break - LF

LF is a code point that acts as a line feed, specifically U+000A, and in text segmentation it functions as a hard line break that terminates a line. In word boundary detection, LF is treated as a standalone break point, meaning it always creates a boundary between words or between a word and other characters, and it never joins with adjacent characters to form a word. This behavior is crucial for correctly handling newline-separated text, such as in source code or plain text files, where each line can be processed independently. Additionally, LF interacts with other break classes, like CR (carriage return), to form a combined break sequence only when directly followed by CR, but otherwise it remains an isolated separator.