Within multilingual documents it is sometimes ambiguous which script a punctuation mark belongs to and so Unicode includes two characters that have strong directionality but are not displayed are ignorable by systems that do not process bidirectional tet and have no glyph associated with them.
It is sometimes ambiguous which script a punctuation mark belongs to and so Unicode includes two characters are ignorable by systems. This was within multilingual documents. These systems do not process bidirectional tet. These systems do not have no glyph associated with them. These two characters have strong directionality. These two characters are not displayed.