The overall direction of a sequence of text. Whereas words in a given script always flow in the direction associated with that script (for example, LTR for Latin, RTL for Arabic and Hebrew), the flow of the sentence itself depends on the reading order. For example, a mixture of Arabic and French text can be regarded as French-embedded in an overall Arabic sentence, implying RTL reading order, or as Arabic-embedded in French, implying LTR reading order.