6. A method of reproducing text subtitle streams, the method comprising: reading, by a data reproducing apparatus, at least one text subtitle stream from a recording medium, each text subtitle stream including a style segment defining region styles and a plurality of presentation segments to which the style segment applies, each presentation segment containing at least one region subtitle and presentation time information, each region subtitle being linked to one of the region styles and including region information associated with the corresponding region subtitle, the presentation time information defining a presentation time of the corresponding presentation segment, the presentation time information including first information for indicating a presentation start time of the corresponding presentation segment and second information for indicating a presentation end time of the corresponding presentation segment, wherein the region information includes data type information and data, the data being defined as inline style information or text string information according to the data type information, the data type information including an end-of-inline-style field for representing that each of the inline style information is applied until an end of the inline style information is detected; and decoding, by the data reproducing apparatus, the at least one text subtitle stream based on the style segment and the region information.
8. The method of claim 6 , wherein the inline style information is configured to change one of region presentation properties specified by the linked region style for the text string, and the region presentation properties comprises font-related properties.