6. The method of claim 1 , wherein the main data is main audio data, the plurality of text sub data units includes lyrics associated with the main audio data such that upon selection of the main audio data, the lyrics for the selected main audio data are displayed on a screen in correspondence with the selected main audio data, and wherein the text sub data units are at a location on the recording medium identified by the linking information and that is different than a location of the navigation information file.
1. A method of recording text sub data, comprising: recording a main data on a recording medium; recording text data including a plurality of individual text sub data units to be presented with the main data on the recording medium, the text sub data units being separated from the main data; and recording a navigation information file including navigation information for accessing the main data and linking information that links the main data and the text sub data units, the navigation information file being separated from the text sub data units, wherein the navigation information file includes a language information field specifying a language code of the text sub data units, wherein the plurality of text sub data units is preloaded into a memory and one of the plurality of text sub data units is displayed with the main data, wherein the navigation information file includes an index number of the text sub data units, wherein the navigation information file includes coding information for the main data and affecting the text data, wherein the plurality of text sub data units is preloaded into the memory before starting presenting with the main data and processed based on attribute information which includes language information regarding a font of the text sub data units, and wherein the text data is processed based on the coding information.