7. A streaming receiving device for receiving streaming live contents comprising: circuitry to: receive data of a movie including a plurality of fragments; determine whether said movie includes a fragment storing a timed text markup language document instance on a basis of fragment classification distinguishing information indicating that said movie includes the fragment storing said timed text markup language document instance, the fragment classification distinguishing information being added to header information of said movie; extract and decode the fragment storing said timed text markup language document instance when said movie is determined to include the fragment storing said timed text markup language document instance; distinguish a classification of said timed text markup language document instance stored in said fragment on a basis of instance classification distinguishing information for distinguishing whether said timed text markup language document instance stored in said fragment is a timed text markup language document instance specifying a rendering context relating to a subtitle, the instance classification distinguishing information being included in header information of said fragment; and determine whether to decode said timed text markup language document instance on a basis of description content identifying information for individually identifying a description content of said timed text markup language document instance relating to said subtitle for distinguishing whether said timed text markup language document instance is an initialization document instance or a body document instance in a sample stored in said fragment using flag information indicating true or false when said timed text markup language document instance stored in said fragment is distinguished as being said timed text markup language document instance specifying the rendering context relating to said subtitle, wherein the sample includes an identifier indicating whether the initialization document instance is changed, and said circuitry analyzes a description of the initialization document instance only when said circuitry determines that said timed text markup language document instance is the initialization document instance and that the identifier indicates the initialization document instance is changed after the initialization document instance was generated.
7. A streaming receiving device for receiving streaming live contents comprising: circuitry to: receive data of a movie including a plurality of fragments; determine whether said movie includes a fragment storing a timed text markup language document instance on a basis of fragment classification distinguishing information indicating that said movie includes the fragment storing said timed text markup language document instance, the fragment classification distinguishing information being added to header information of said movie; extract and decode the fragment storing said timed text markup language document instance when said movie is determined to include the fragment storing said timed text markup language document instance; distinguish a classification of said timed text markup language document instance stored in said fragment on a basis of instance classification distinguishing information for distinguishing whether said timed text markup language document instance stored in said fragment is a timed text markup language document instance specifying a rendering context relating to a subtitle, the instance classification distinguishing information being included in header information of said fragment; and determine whether to decode said timed text markup language document instance on a basis of description content identifying information for individually identifying a description content of said timed text markup language document instance relating to said subtitle for distinguishing whether said timed text markup language document instance is an initialization document instance or a body document instance in a sample stored in said fragment using flag information indicating true or false when said timed text markup language document instance stored in said fragment is distinguished as being said timed text markup language document instance specifying the rendering context relating to said subtitle, wherein the sample includes an identifier indicating whether the initialization document instance is changed, and said circuitry analyzes a description of the initialization document instance only when said circuitry determines that said timed text markup language document instance is the initialization document instance and that the identifier indicates the initialization document instance is changed after the initialization document instance was generated. 8. The streaming receiving device according to claim 7 , wherein when said movie is determined to include the fragment storing said timed text markup language document instance, said circuitry decodes a timed text markup language document instance specifying a rendering context relating to a subtitle, said timed text markup language document instance specifying the rendering context relating to the subtitle being included in the fragment classification distinguishing information.