JP2003348531A - Data management apparatus, method therefor, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data management apparatus, a method therefor, and a program in which data are efficiently managed by reducing editing of additional information in real data. <P>SOLUTION: A write/read part 205 generates first data as template data of the additional information and writes the first data onto a memory card 206. Besides, the write/read part 205 reads an additional information data part out of second data composed of a real data part and its additional information data part written onto the memory card 206. A data composing part 203 compares the read additional information data part with the first data, generates a new additional information data part with respect to the real data part contained in the second data based upon the compared result, and generates third data composed of the real data part and the new additional information data. Then, the third data are managed in a data saving part 203a. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data management device for managing data, a method thereof, and a program.

[0002]

2. Description of the Related Art With the spread of high-speed lines and the spread of digital devices represented by digital cameras, digital information handled by ordinary households is increasing dramatically. In order to use digital contents obtained from these digital devices, it is necessary to construct search and management by some method. To realize efficient search and management, it is common to add attribute data of target data, that is, metadata such as a creator, a title, and a place.

When a data server that manages such data is shared and used, a corresponding folder is prepared in the server for the purpose of distinguishing data owners, and management such as saving data is performed. Is common.

For example, in Japanese Patent Application Laid-Open No. 2001-75846, data serving as metadata is recorded in a memory card in advance, and when data obtained by photographing with a digital camera is recorded in the memory card, the data is recorded in advance. A method of connecting and storing metadata with image data has been proposed.

[0005]

However, in the above-mentioned conventional example, for example, when storing and managing image data shot by a digital camera, a keyword or the like related to the image data is added or replaced as metadata to each image. The work to perform the work is very complicated. for that reason,
These operations are not usually performed, and the metadata added to the image data recorded and stored by the digital camera is often default metadata. For this reason, at present, useful metadata management applications are not utilized.

Further, in Japanese Patent Application Laid-Open No. 2001-75846, since metadata recorded in advance on the digital camera side is linked and stored, complicated metadata processing remains in a situation where the metadata is used in combination with a camera without this function.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a data management apparatus, a method, and a program capable of reducing the work of editing additional information of actual data and efficiently managing data. The purpose is to provide.

[0008]

A data management apparatus according to the present invention for achieving the above object has the following arrangement. That is, a data management device for managing data,
Writing means for generating and writing first data, which is template data of the additional information, to a storage medium; and of the second data comprising the actual data portion and the additional information data portion written to the storage medium, Reading means for reading the additional information data part; comparing means for comparing the additional information data part read by the reading means with the first data; and a second data included in the second data based on a comparison result of the comparing means. Generating means for generating a new additional information data part for the real data part to be generated, generating third data including the real data part and the new additional information data, and managing means for managing the third data. .

Preferably, when the first data and the additional information data have the same item as a result of the comparison by the comparing means, the generating means sets the additional information data as the new additional information data. Additional information data is generated by replacing the content of the item with the content of the corresponding item of the first data.

Preferably, when the comparison result of the comparing means indicates that the first data has a content of an item different from that of the additional information data, the generating means sets the different as the new additional information data. The additional information data is generated by adding the content of the item as the content of a new item of the additional information data.

Preferably, when a result of the comparison by the comparing means includes a content of an item different from the additional information data in the first data, the generating means sets the different item as the new additional information data. And generating additional information data for associating the contents of the item with the additional information data.

Preferably, the storage medium is a removable external memory.

Preferably, the first data is any of text data, text data in XML format, or binary data.

Preferably, the actual data portion is at least one of image data and audio data.

A data management device according to the present invention for achieving the above object has the following configuration. That is, a data management method for managing data, comprising: a writing step of generating first data that is template data of additional information and writing the first data to a storage medium; A reading step of reading the additional information data portion of the second data comprising the additional information data portion; a comparing step of comparing the additional information data portion read in the reading step with the first data; Generating a new additional information data portion with respect to the real data portion included in the second data based on the comparison result, and generating third data including the real data portion and the new additional information data; And a management step of managing the third data.

A program according to the present invention for achieving the above object has the following configuration. That is, a program for causing a computer to perform data management for managing data, a program code for a writing step of generating first data as template data of additional information and writing the first data to a storage medium, The program code of the reading step of reading the additional information data portion of the second data composed of the actual data portion and the additional information data portion written thereto, and the additional information data portion read in the reading step, Based on the program code of the comparing step of comparing the first data and the comparison result of the comparing step, a new additional information data part for the real data part included in the second data is generated. A program code for a generation step of generating third data including new additional information data, and a management program for managing the third data. And a program code.

[0017]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

<Embodiment 1> FIG. 1 shows Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a hardware configuration of a data management system of FIG.

A hard disk drive (HDD) 101 stores various data. 102 is a display. A ROM 103 stores data such as various control programs and parameters for controlling processing realized by the data management system. A RAM 104 functions as a work area for processing various data and a temporary save area. A CPU 105 controls the entire data management system. Reference numeral 106 denotes an input device such as a keyboard. 107 is a pointing device such as a mouse. Reference numeral 108 denotes an external memory interface (I / F) for connecting the removable external memory 108a.

Reference numeral 109 denotes an extension bus interface (I /
F) / LAN interface (I / F). 110
Is a scanner. 111 is a modem.

Note that the external memory interface 108
An external memory 108a such as a PCMCIA card, CompactFlash (registered trademark), or SmartMedia is connected directly or via a conversion connector.

The expansion bus interface / LAN interface (I / F) 109 is a SCSI, USB,
In addition to an interface conforming to the parallel or serial standard such as IEEE1394, an external device is connected using an interface capable of constructing a LAN. In FIG. 1, the external devices are the scanner 110 and the modem 111. In addition, external storage devices such as a CD-ROM and a DVD-ROM drive, and image input external devices such as a digital camera and a film scanner can be connected. It is.

FIG. 2 is a diagram showing a functional configuration of the data management system according to the first embodiment of the present invention.

Reference numeral 201 denotes a data management device realized by the data management system shown in FIG. Reference numeral 202 denotes a hard disk for storing various data, which corresponds to the hard disk 101 in FIG. Reference numeral 203 denotes a data synthesis unit that performs data synthesis described below. A data storage unit 203a functions as a database. The data storage unit 203a may be configured in the hard disk 202. Reference numeral 204 denotes a metadata generation unit that generates metadata.

Reference numeral 205 denotes a writing / reading unit having a memory card interface, which corresponds to the external memory interface 108 in FIG. Reference numeral 206 denotes a memory card, which corresponds to the external memory 108a in FIG. 207 is
The digital camera functions as a memory card device on which the memory card 206 can be mounted. Reference numeral 208 denotes a writing unit that writes data to the memory card 206.

In the digital camera 207, the writing unit 2
In addition to 08, it is assumed that the digital camera actually has various components (for example, a CPU, a ROM, a liquid crystal monitor, a CCD, etc.) that constitute a standard digital camera.

Next, the operation of each component will be described.

The metadata generation unit 204 generates metadata according to the input from the input device 106 and writes / writes the metadata.
Writing is performed as first data on the memory card 206 via the reading unit 205. After the memory card 206 on which the first data has been written is removed from the data management device 201 and attached to the digital camera 207, the digital camera 20
7, image data (actual data) obtained by shooting and metadata as additional information (shooting date and time, shooting resolution,
The photographer, title, etc.) as the second data,
8 to the memory card 206.

The first detached from the digital camera 207
And the memory card 20 in which the writing of the second data is completed
6 is mounted on the data management device 201 again, the data management device 201 reads the first and second data as the contents of the memory card 206 via the writing / reading unit 205.

The metadata portions of the read first data and the second data are temporarily stored in the data storage unit 203a or the hard disk drive 202, and the metadata of the first data and the second data are stored by the data synthesizing unit 203. Some or all of the items related between departments are first
Replaced or added with data, database storage unit 203a
Is stored as third data together with the image data portion of the second data.

The data synthesizing unit 203, the data storage unit 203a, and the metadata generating unit 20 of the data management device 201
4. The functions realized by the writing / reading unit 205 may be realized by executing a program stored in the ROM 103 or the hard disk drive 101 inside the data management apparatus 201 by the CPU 105, or by using dedicated hardware. It may be realized by.

Similarly, the writing unit 2 of the digital camera 207
The function realized in 08 is the ROM inside the digital camera.
May be realized by executing a program stored in the CPU, or may be realized by dedicated hardware.

An example of an actual use form will be described below.

Before starting photographing using the digital camera 207, for example, in a preparatory stage for going to a shrine visit, the user inserts the memory card 206 into the data management device 201,
Additional information such as an event name, a place, and a date to be photographed that is known in advance is recorded as a metadata template.

The metadata is composed of a plurality of item data and a character string which is information corresponding to the actual item data. The description includes text data, XML (Exte
nsible Markup Language) or binary data.

For example, a date (Dat) which is item data
e) is January 1, 2002, the photographer (User) as item data is Taro, and the event name (T
(Plac)
In the case where the information of e) is known as XX shrine, an example in which these metadata are described by text data is shown below. <Meta String> User: Taro; Date: 2002-01-01; Title: Hatsumode; Place: OO Shrine;
In, for example, Metastg. The data is written under the root directory (Root) of the memory card 206 as first data having a file name of mta.

Memory card 2 on which first data is written
06 is detached from the data management device 201 and mounted on the digital camera 207 to perform photographing. The image data obtained by shooting and the metadata thereof are generally written as second data to the memory card 206 via the writing unit 208 in a recording format conforming to the DCF standard.

FIG. 3 shows an example of the data configuration of the memory card 206 at this time.

FIG. 3 is a diagram showing an example of the data configuration of the memory card according to the first embodiment of the present invention.

As shown in FIG. 3, the memory card 20
6, in its root directory (Root),
If the file name is Metastg. mta first data;
A plurality of second data are configured.

Next, a specific example of processing executed by the data synthesizing unit 203 of the data management apparatus 201 will be described with reference to FIG.

FIG. 4 is a diagram for explaining a method of replacing and adding metadata according to the first embodiment of the present invention.

In FIG. 4, reference numeral 501 denotes a specific example of the first data in a hierarchical manner, and reference numeral 502 denotes a specific example of the second data in a hierarchical manner.

The data synthesizing unit 203 outputs the first data 501
And the respective metadata portions of the second data 502 are compared. In this case, the portion 504 in the second data 502 is the first data
Since the contents of the data match, the data synthesizing unit 20
3 generates third data 503 in which the contents of the 504 part in the second data are replaced with the contents of the 501 part of the first data, and registers and saves this in the data storage unit 203a.

Next, details of the processing executed by the data synthesizing unit 203 will be described with reference to FIG.

FIG. 5 is a flowchart showing processing executed by the data synthesizing unit according to the first embodiment of the present invention.

In step S601, the writing / reading unit 205
It is determined whether or not the storage medium to be processed is the memory card 206. If the storage medium is the memory card 206 (Yes in step S601), step S60
Proceed to 3. If the storage medium is not the memory card 206 (No in step s601), the process advances to step S602.

In step S603, the memory card 206
It is determined whether or not the first data is stored therein. If the first data is not stored (No in step S603), the third data is not generated, and the process is terminated after executing the normal storage process of storing the second data on the memory card 206 in the data storage unit 203a. I do. On the other hand, if the first data is stored (Yes in step S603), the process advances to step S604 to read the metadata part of the second data on the memory card 206.

On the other hand, in step S602, it is determined whether the first data is stored in a predetermined area on a storage medium (for example, the hard disk drive 202).
When the first data is not stored (step S602)
No), the third data is not generated, and the normal storage processing for storing the second data on the storage medium in the data storage unit 203a is executed, and then the processing is terminated. On the other hand, if the first data is stored (Yes in step S602), the process proceeds to step S602.
Proceeding to 604, the metadata part of the second data on the storage medium is read.

In step S605, the metadata section of the first data and the metadata section of the second data are compared to determine whether or not there is the same item. If there is the same item (Yes in step S605), the process proceeds to step S606, and the second
A replacement process is performed to replace data corresponding to the corresponding item in the metadata portion of the data with data corresponding to the corresponding item in the metadata portion of the first data. Next, in step S607,
The image data part of the second data is combined with the metadata part generated in step S606 to generate third data, which is stored in the data storage unit 203a.

On the other hand, when there is no identical item (step S6)
05, No), the process proceeds to step S608, and an additional process of adding the metadata portion of the first data to the metadata portion of the second data is performed. Then, in step S607, the image data of the second data is combined with the metadata part generated in step S608 to generate third data.

In the first embodiment, the replacement process or the addition process of the metadata part has been described. However, new data in which the first and second data are associated may be generated.

As described above, according to the first embodiment, the template data of the metadata is prepared in advance as the first data, and the first data is compared with the metadata in the second data to be managed by the database. Then, based on the comparison result, the content of the first data is reflected in the metadata of the second data. Then, the third data including the actual data portion of the second data and the metadata portion reflected on the second data is managed in the database. Thereby, the input work for separately editing the metadata of the second data can be reduced.

<Embodiment 2> When an image is continuously taken into the data management device 201 by an image input device such as a scanner, the band image data transferred from the scanner is usually stored in the terminal so as to become one image data. Are sequentially stored in the temporary storage area of the storage medium. Thereafter, it is common to name and save the image data formed in this one image on a desired storage medium.

The digital camera 20 described in the first embodiment
7, the first data serving as metadata and the second data including the image data and the metadata are stored and managed in the same memory card 206, so that the first data and the second data are stored in the same memory card 206. Third data based on the data was generated.

On the other hand, in the second embodiment, when the data management device 201 is connected to an image input device such as a scanner by communication, it is based on the second data and the first data obtained from the image input device. The third data is generated and stored in the data storage unit 203a.

In this case, the first data is stored in a specific memory or the hard disk drive 2 in the data management device 201.
02 in a predetermined area. On the other hand, the image data and its metadata received from the image input device are stored as second data in a specific memory in the data management device 201 or a temporary storage area of the hard disk drive 202.

Next, a functional configuration of the data management system according to the second embodiment will be described with reference to FIG.

FIG. 6 is a diagram showing a functional configuration of the data management system according to the second embodiment of the present invention.

In the data management system of the second embodiment, the same reference numerals are given to the same components as those in the functional configuration of the data management system of the first embodiment, and the details are omitted. .

In particular, in the second embodiment, when the second data is received from the scanner 304 as an image input device, it is determined whether the first data is stored in a predetermined area of the hard disk drive 202 and the first data is determined. If data exists, the third data is generated based on the respective metadata sections of the first data and the second data, and is stored in the data storage unit 203a.

In FIG. 6, the first data created by the metadata generation unit 202 is a hard disk drive 202
Is stored in a predetermined area, which is the first data storage area. The image data read by the scanner 304 is transmitted to the external interface 30 under the control of the communication control storage management unit 302.
3, the data is transferred from the data transfer unit 305 of the scanner 304 to the data management apparatus 201 in a predetermined data unit. The data management device 201 stores the transferred unit image data in a temporary storage area of the hard disk drive 202 in order to form the image data into one image data.

Similarly, the additional information data (device name, input resolution, data size, etc.) of the image data transferred from the scanner 304 is transferred to the data management device 201, and the already stored image data and its additional information data are transferred. The second
Save the data in the temporary storage area. At this stage, the image data is in a temporary storage state in which information such as a file name is not set.

When the storage of the second data stored in the temporary storage area is performed, the first data in the predetermined area of the hard disk drive 202 by the data synthesizing unit 203 is stored.
Part or all of the items related between the metadata section of the data and the metadata section of the second data in the temporary storage area are replaced or added with the first data, and the image data of the second data is stored in the database storage section 203a. And the third data together with the data.

Next, details of the processing executed by the data synthesizing unit 203 will be described with reference to FIG. 5 of the first embodiment.

In the second embodiment, the data management device 2
01 is connected to the scanner 304, the processing from step S601 to the processing in step S602 is executed.

That is, in step S602, it is determined whether the first data is stored in a predetermined area on the hard disk drive 202. If the first data is not stored (No in step S602), the process ends after executing the normal saving process of saving the second data in the temporary saving area in the hard disk drive 202 in the data saving unit 203a. On the other hand, if the first data is stored (Yes in step S602), step S60
Proceeding to 4, the metadata part of the second data on the temporary storage area in the hard disk drive 202 is read.

Thereafter, in the process of step S604, the third data is generated based on the metadata of the first data and the second data on the hard disk 202 according to the procedure described in the first embodiment, and the data storage unit 203a Keep in.

As described above, according to the second embodiment, the same effects as those described in the first embodiment can be applied to image data directly input to the data management apparatus 201 from an image input device such as a scanner. Can be obtained.

In the above embodiment, the second data composed of the image data which is the actual data and the metadata thereof has been described. However, the present invention is not limited to this, and the actual data (still image, moving image, Any data may be used as long as the data includes audio and its metadata.
For example, data consisting of voiceprint data and its additional information (voiceprint analysis data and personal identifiers), retinal patterns and their additional information (retinal pattern analysis data and personal identifiers), and fingerprint patterns and their additional information (fingerprint pattern analysis data and Data consisting of a personal identifier) may be used as the second data.

Also, since the metadata is described in text data, particularly in XML format, by separately extracting and managing the XML data portion, any device or application capable of interpreting the XML data can be used. For example, it is possible to add, change, and reference the metadata described in the first and second embodiments, and it is very versatile.

Further, by embedding the metadata in the actual data, even when the actual data is transferred, the metadata is always transferred together with the actual data to, for example, a data management device connected on a network. The processing described in the first and second embodiments can also be realized.

Further, UR is added to the metadata as the first data.
The configuration may be such that L data is associated and registered and managed in a WEB server on the network. With such a configuration, it is not necessary to always manage the first data on the data management device, so that the storage resources of the data management device can be saved and the WEB server that manages the metadata can be accessed. In the case of a terminal, the first and second embodiments
Can be easily and efficiently realized.

Further, by applying, in addition to the metadata, a URL may be associated with the actual data so that the metadata and the actual data have a certain relationship. With such a configuration, the correspondence between the image data and the metadata can be easily grasped. For example, by referring to the file name of the actual data, the corresponding metadata can be easily grasped.

Although the embodiments have been described in detail, the present invention may be applied to a system including a plurality of devices, or may be applied to an apparatus including a single device.

It should be noted that the present invention provides a software program (in the embodiment, FIG.
(A program corresponding to the flowchart shown in (1)) is directly or remotely supplied to a system or an apparatus, and a computer of the system or the apparatus reads out and executes the supplied program code to achieve the above-described operation. In that case, the form need not be a program as long as it has the function of the program.

Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. That is, the present invention includes the computer program itself for realizing the functional processing of the present invention.

In this case, any form of program, such as object code, a program executed by the interpreter, and script data supplied to the OS, is possible as long as the program has the function of the program.

As a recording medium for supplying the program, for example, a floppy (registered trademark) disk, hard disk, optical disk, magneto-optical disk, MO, CD
-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM,
DVD-R).

In addition, as a program supply method,
It can also be supplied by connecting to a homepage on the Internet using a browser of a client computer and downloading the computer program itself of the present invention or a compressed file including an automatic installation function to a recording medium such as a hard disk from the homepage. Further, the present invention can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, the present invention also includes a WWW server that allows a plurality of users to download a program file for implementing the functional processing of the present invention on a computer.

The program of the present invention is encrypted to
By storing the information in a storage medium such as a D-ROM and distributing it to users, and allowing users who have cleared predetermined conditions to download key information for decryption from a home page via the Internet and using the key information It is also possible to execute the encrypted program and install the program on a computer.

The functions of the above-described embodiments are implemented when the computer executes the read program, and the OS or the like running on the computer executes actual processing based on the instructions of the program. Is performed, and the functions of the above-described embodiments can also be realized by the processing.

Further, after the program read from the recording medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instructions of the program,
CPU installed in the function expansion board or function expansion unit
Perform part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

[0084]

As described above, according to the present invention,
It is possible to provide a data management device, a method, and a program capable of reducing the work of editing additional information of actual data and efficiently managing data.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a hardware configuration of a data management system according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a functional configuration of a data management system according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a data configuration example of a memory card according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining a method of replacing and adding metadata according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a process executed by a data synthesizing unit according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a functional configuration of a data management system according to a second embodiment of the present invention.

[Explanation of symbols]

101 HDD (hard disk) 102 Display 103 ROM 104 RAM 105 CPU 106 input device 107 pointing device 108 External memory I / F 109 Expansion bus I / F 110 scanner 111 modem 202 HDD 203 Data synthesis unit 204 Metadata generation unit 205 writing / reading unit 206 Memory Card 207 Memory card device 208 Writing Unit 302 Communication control / data storage management unit 303 External bus I / F 304 scanner 305 Data transfer unit

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Tadashi Takayama             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation (72) Inventor Mamoru Yoshimoto             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation (72) Inventor Masato Fujiwara             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation (72) Inventor Makoto Kobayashi             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation (72) Inventor Masumi Ishiwatari             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation (72) Inventor Hiroyasu Ito             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non Corporation F term (reference) 5B050 AA09 GA08                 5B082 AA13 EA07                 5C052 AA17 AB02 AC08 CC01 DD02                 5C053 FA08 FA27 GB06 GB21 HA30                       JA16 JA21 KA01 KA26

Claims (15)

[Claims] 1. A data management device for managing data, comprising: writing means for generating and writing first data, which is template data of additional information, to a storage medium; and actual data written to the storage medium. Reading means for reading out the additional information data part of the second data comprising the part and the additional information data part; comparing means for comparing the additional information data part read by the reading means with the first data; On the basis of the comparison result of the comparing means, a new additional information data portion for the real data portion included in the second data is generated, and third data including the real data portion and the new additional information data is generated. A data management device comprising: a generation unit; and a management unit that manages the third data. 2. If the first data and the additional information data have the same item as a result of the comparison by the comparing unit, the generation unit sets the new item of additional information data as the new additional information data. 2. The data management device according to claim 1, wherein the additional information data is generated by replacing the content with the content of a corresponding item of the first data. 3. As a result of the comparison by the comparing means, if the first data has content of an item different from the additional information data, the generating means sets the content of the different item as the new additional information data. 2. The data management apparatus according to claim 1, wherein the additional information data is generated by adding an additional information as the content of a new item of the additional information data. 4. When the first data has a content of an item different from the additional information data as a result of the comparison by the comparing means, the generating means sets the content of the different item as the new additional information data. 2. The data management apparatus according to claim 1, wherein additional information data is generated in which the additional information data is associated with the additional information data. 5. The data management device according to claim 1, wherein the storage medium is a removable external memory. 6. The first data is text data, X
2. The data management device according to claim 1, wherein the data management device is one of ML text data and binary data. 7. The data management device according to claim 1, wherein the actual data section is at least one of image data and audio data. 8. A data management method for managing data, comprising: a writing step of generating and writing first data as template data of additional information to a storage medium; and a real data written to the storage medium. Readout step of reading out the additional information data part of the second data consisting of a part and the additional information data part thereof; a comparing step of comparing the additional information data part read out in the readout step with the first data; Based on the comparison result of the comparing step, a new additional information data section is generated for the real data section included in the second data, and third data including the real data section and the new additional information data is generated. A data management method comprising: a generation step; and a management step of managing the third data. 9. When the first data and the additional information data have the same item as a result of the comparison in the comparing step, the generating step includes, as the new additional information data, the item of the item of the additional information data. 9. The data management method according to claim 8, wherein the additional information data is generated by replacing the content with the content of a corresponding item of the first data. 10. The result of the comparison in the comparison step, wherein the first
In the case where the content of the item different from the additional information data exists in the data, the generating step includes, as the new additional information data, additional information in which the content of the different item is added as the content of a new item of the additional information data. The data management method according to claim 8, wherein data is generated. 11. As a result of the comparison in the comparing step, the first
In the case where the data includes content of an item different from the additional information data, the generating step includes generating, as the new additional information data, additional information data that associates the content of the different item with the additional information data. 9. The data management method according to claim 8, wherein: 12. The data management method according to claim 8, wherein the storage medium is a removable external memory. 13. The first data is text data,
9. The data management method according to claim 8, wherein the data is either text data or binary data in XML format. 14. The data management method according to claim 8, wherein the actual data section is at least one of image data and audio data. 15. A program for causing a computer to perform data management for managing data, comprising: a program code for a writing step of generating first data as template data of additional information and writing the first data to a storage medium; A program code of a reading step of reading out the additional information data portion of the second data including the real data portion and the additional information data portion written on the storage medium; and the additional information data read out in the reading step Generating a new additional information data part for a real data part included in the second data based on a program code of a comparing step of comparing the first data with the first data; A program code for a generating step of generating third data comprising a unit and the new additional information data; Program; and a program code of the management process of.