Abstract: A recording apparatus reads a content management file from a file information obtaining means, and a data analysis and search means searches for a specified digital content information storing portions from the read content management file and searches for a play list file including specified digital contents in reproduction order based on reference play list information of the content information storing portions. The file information obtaining means reads a relevant play list file, and the data analysis and search means searches for an updated location and notifies a play list file creation means thereof so that the play list file creation means correctly updates the play list file.

Abstract: [Object] When additional recording is performed by a recording apparatus and a program of a different method of management information construction to a recording medium having recorded thereon management information data such as a content parameter, a menu, a play list and a menu display image together with content data such as an audio, a static image and a video, consistency of the management information data is lost. [Solution] It is possible to record in a file header portion 31 of a management information file group 2 an editor identifier 33 for identifying an apparatus and a program having edited that file, trace update history of the file with a file management device 14 and update information with a management information file creation device 15 by reflecting an intention of management information already recorded so as to keep the consistency of the management information.

Abstract: A recording and reproducing system includes a DVD-RAM medium having a plurality of data files of storing predetermined data, file recording means of recording, in a play list file held by the DVD-RAM medium, a play list of describing reproduction order of reproducing the predetermined data stored in each of all or a part of the data files out of the plurality of data files by using a file name of the data file and a unique directory ID provided to a directory to which the data file belongs, and file reproducing means of reproducing the predetermined data stored by each of all or a part of the data files out of the plurality of data files based on the recorded play list.

Abstract: [Problems] There has been a problem that it takes time from insertion of a record medium until it becomes reproducible. [Means for Solution] A recording and reproducing system has a record medium 15 of holding a data file 13 of storing predetermined data, a file recording means 14 of recording data file holding position information on a position at which the data file 13 is held in a data file holding position information file 17 held on the record medium 15 of storing the data file holding position information, a data recording state obtaining means 18, a recording position information file creating means 34, and a file reproducing means 23 of reproducing the predetermined data stored in the data file 13 by using the recorded data file holding position information.

Abstract: [Problem] There has been a problem that, in the case where a plurality of play list files are recorded in a record medium such as a CD-R, it is difficult to manage the play list files. [Means for Solution] A recording and reproducing system has a CD-RW medium 15 for holding a plurality of play list files for storing a play list describing reproduction order of a plurality of data files, a file recording means 14 of storing in a play list file menu file a play list file menu which is information for selecting a predetermined play list file, a menu definition file creating means 33, a controlling means 21 of displaying play list file menu information on all or a part of the stored play list file menus and selecting the predetermined play list file according to an instruction, a reproduction instructing means 22, a file reproducing means 23, and a data file output means 24.