6. The method of claim 1 , wherein the global style comprises a plurality of display properties including font-related display properties required for displaying the text data, and the local style comprises at least one of the font-related display properties applied for the portion of the text data.
7. The method of claim 6 , wherein the plurality of display properties specified in the region style information include at least one of a region position, a region size, a region background color, a text position, a text flow, a text alignment, a line space, a font identification, a font style, a font size, and a font color.