This annex describes guidelines for determining default boundaries between certain significant text elements: grapheme clusters (“user-perceived characters”), words, and sentences. For line break boundaries, see UAX #14, “Line Breaking Properties.” Status This is a draft document which may be updated, replaced, or superseded by other documents at any time. Publication does not imply endorsement by the Unicode Consortium. This is not a stable document; it is inappropriate to cite this document as other than a work in progress. A Unicode Standard Annex (UAX) forms an integral part of the Unicode Standard, but is published online as a separate document. The Unicode Standard may require conformance to normative content in a Unicode Standard Ann...