14. A document processing method comprising: detecting video data designation information attached to electronic document data, the electronic document data including: (i) a first element having a first central activation value used to generate an index; (ii) a second element having a second central activation value used to generate said index; and (iii) read out audio attribute information; generating a summary of said electronic document data, wherein said generation of said summary includes spreading said first central activation value to said second central activation value; selecting video data in accordance with said detected video data designation information; storing a categorization model including a plurality of data categories; creating an automatic categorization based on any one of said video data and electronic document data in accordance with the categorization model; updating the categorization model with the automatic categorization; controlling an output of said summary of said electronic document data such that said summary of said electronic data being output is automatically progressed based on at least one of a size of a display area and a length of time displayed; controlling an output of said selected video data in correspondence with the output of said summary of said electronic document data such that said selected video data being output is output in synchronization with said progress of the said operation of outputting said summary of said electronic data; controlling an output of a read out audio based on read out audio attribute information in said electronic document to synthesize said read out audio; and automatically terminate the output of said video data upon completion of the outputting of said summary of said electronic document data regardless of whether an end of the video data has been reached.
14. A document processing method comprising: detecting video data designation information attached to electronic document data, the electronic document data including: (i) a first element having a first central activation value used to generate an index; (ii) a second element having a second central activation value used to generate said index; and (iii) read out audio attribute information; generating a summary of said electronic document data, wherein said generation of said summary includes spreading said first central activation value to said second central activation value; selecting video data in accordance with said detected video data designation information; storing a categorization model including a plurality of data categories; creating an automatic categorization based on any one of said video data and electronic document data in accordance with the categorization model; updating the categorization model with the automatic categorization; controlling an output of said summary of said electronic document data such that said summary of said electronic data being output is automatically progressed based on at least one of a size of a display area and a length of time displayed; controlling an output of said selected video data in correspondence with the output of said summary of said electronic document data such that said selected video data being output is output in synchronization with said progress of the said operation of outputting said summary of said electronic data; controlling an output of a read out audio based on read out audio attribute information in said electronic document to synthesize said read out audio; and automatically terminate the output of said video data upon completion of the outputting of said summary of said electronic document data regardless of whether an end of the video data has been reached. 15. The document processing method of claim 14 , further comprising: controlling the output of a voice reading aloud said electronic document data; and controlling the outputting of said video data, in synchronization with the progress of the operation of reading aloud said electronic data.