Sentence Break - Sp

Sp is a classification used in text segmentation to identify spaces and other whitespace characters that act as sentence boundaries, but only when they appear between sentence-ending punctuation and the start of a new sentence. These characters, such as the regular space, tab, or non-breaking space, are not themselves punctuation but serve as separators that help determine where one sentence ends and another begins. In practice, Sp characters are treated as neutral or boundary-promoting, meaning they can either close a sentence or allow it to continue depending on the surrounding context, such as whether they follow a period, question mark, or exclamation point. Their role is crucial for accurate line breaking and sentence detection in languages that use spaces between words.