1. A non-transitory recording medium for storing a data structure, the data structure comprising: at least one text subtitle stream, the text subtitle stream including a style segment and one or more presentation segments, the style segment defining at least one region style and the presentation segment containing at least one region of text linked to one of the at least one region style defined in the style segment by an identifier, wherein the presentation segment recorded or reproduced by a recording/reproducing device contains a continuous presentation flag to indicate that whether continuous presentation is required or not between a current presentation segment and a previous presentation segment, and a presentation time information indicating a start time of the presentation segment and an end time of the presentation segment, wherein the at least one region of text included in the presentation segment is linked to the at least one region style specifying a same text flow, wherein if the continuous presentation flag indicates that continuation presentation is required between the current presentation segment and the previous presentation segment, presentation of the at least one region of text in the previous presentation segment is preserved by the recording/reproducing device for presentation of the current presentation segment, wherein the at least one region of text including text data in which one of the at least one region style applied.