JP2644535B2 - Network file search processing system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-network file search processing system, and more particularly, to searching for a part of a file in an OSI (Open System Interconnection) file transfer system and transferring file data. The present invention relates to an inter-network file search processing system that performs a communication process for transferring.

[Conventional technology]

2. Description of the Related Art Conventionally, when configuring a network system, functions to be provided in a communication system are arranged so that even different types of devices can be connected, standardization of each function is performed, and a systematic system is constructed. Is desired.
As a model of such a network system, OSI
There is a basic reference model. This aims to standardize the protocol architecture between network architectures.
This is a reference model established by a technical committee of ISO (International Organization for Standardization). The reference model is composed of seven protocol layers with function hierarchies.

Regarding file transfer between networks, a file called a virtual file is defined in the file transfer defined by OSI. The virtual file is defined in three structures, and has three types of structures: a file without a structure, a two-layer (flat structure) file, and a tree structure (hierarchical structure) file. When the file structure of the virtual file is a two-layer file and a tree structure file, it is necessary to map data in the real file stored in a disk device or the like and a part of the structure of the virtual file. In other words, the minimum unit that can be accessed in the virtual file of the two-layer file or the tree structure file must define the correspondence relationship between the records of the real file and the blocks. The definition of this correspondence is called mapping information and can be freely set by the file provider. By knowing the mapping information, the file user knows that the data in the file to be searched (data of a part of the real file) corresponds to a certain part of the virtual file (this is, for example, A data). FTAM (File Trasf
The desired data can be obtained by searching for the A data using the function of “Access and Management”.

[Problems to be solved by the invention]

However, in FTAM (ISO8571), since there is no rule on the method of setting the mapping information, it is difficult for a file user to perform a file search without knowing the mapping information.

As described above, in FTAM, since the mapping information freely set by the file provider is not notified to the file user, it is difficult for the file user to perform a file search in the network system. was there.

An object of the present invention is to enable a file user to easily search for a file provided by a file provider.

The above and other objects and novel features of the present invention are as follows.
The description of the present invention and the accompanying drawings will become apparent.

[Means for solving the problem]

In order to achieve the above object, in the present invention, in an inter-network file search processing system for searching for file data and transferring the searched data between network systems in which each terminal device is interconnected,
The file providing terminal device creates mapping information indicating a correspondence between the created virtual file and the real file for each file user according to the file user list, and distributes the mapping information to the file using terminal device. The file use terminal device includes means for searching for a desired file specified by the file user based on the mapping information and accessing the desired file of the file providing terminal device.

[Action]

According to the means, the mapping information indicating the correspondence between the virtual file and the real file is created in the file providing terminal device corresponding to each file user according to the file user list, and is distributed to the file using terminal device. . For this reason, the mapping information is managed by the file providing terminal device according to the file user list. That is, the file providing terminal device creates and distributes mapping information between a real file having data and a virtual file to the file using terminal device. Further, the file providing terminal device manages mapping information corresponding to each file user, and when a search request is received from the file user, extracts data in the actual file according to the mapping information.

Thus, the file user can easily search even a part of the data, and the file user can easily retrieve desired file data from the file providing terminal device.

〔Example〕

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a network system according to one embodiment of the present invention. In FIG. 1, 10 is a network, 11a to 15a are communication control processing devices,
11b to 15b are terminal devices, and 11c to 15c are file devices.
Each of the terminal devices 11b to 15b used by the file provider or the file user and the communication control processing devices 11a to 15a to which the file devices 11c to 15c are connected are connected to the network 10, forming a network system. I have. In this network system, a file user performs a file search on file data provided by a file provider to obtain desired file data. The communication control processing device to which each terminal device is connected can be the file provider side or the file user side. For example, when it is desired to retrieve the file data of the file device 12c from the terminal device 14b, the communication control processing device 14a performs the process on the file user side, and the communication control processing device 12a performs the process on the file provider side.

FIG. 2a is a block diagram of a main part for explaining file processing in a communication control processing device that performs processing on the file provider side. FIG. 2b is a block diagram of a main part for explaining file processing in the communication control processing device that performs processing on the file user side.

First, with reference to FIG. 2a, the configuration of the main part of the communication control processing device that performs the process on the file provider side will be described. On the file provider side, real files I, real files II, and real files III are stored in the database devices 51, 52, and 53, respectively. The database devices 61 and 62 store the file names A, B,... Of the virtual files used in the FTAM and information representing the corresponding file structure. The database device 7 also has a file user list 71
And mapping information 72 are stored. The file user list 71 associates a searchable virtual file name with a file user name. The mapping information 72 includes a correspondence between each virtual file and a corresponding real file, and a virtual file name. The names of the minimum accessible unit in the table and the data record of the actual file that can be actually searched by the name are shown. The mapping information 72 is created in advance by the processing device 2a when the file provider creates a file to be provided, and is used to provide the same mapping information to both the file provider and the file user. Is distributed before the file is accessed from the user to the file user. Note that reference numeral 1a denotes a communication control device on the file provider side, which performs communication control on the network. Reference numeral 2a denotes a processing device on the file provider side, which manages files and performs processing such as file search.

Next, with reference to FIG. 2b, the configuration of the main part of the communication control processing device that performs the process on the file user side will be described. On the file user side, mapping information 35 distributed from the file provider is stored in the database device 3. By using this mapping information 35, the processing device 2b sends the file to the file provider. The user accesses a file specified by the user, stores the file in the database device 4, and uses desired file data. Like the file provider, reference numeral 1b denotes a communication control device on the file user side, which controls communication with the network. Reference numeral 2b denotes a processing device on the file user side.
2b manages the mapping information 35 and performs processing such as file search.

FIG. 3 is a flowchart showing the flow of a file search process between the file user and the file provider. According to the flowchart of FIG. 3, FIG.
The file search process will be described with reference to FIG.

When the user TARO desires to extract the contents related to the data X in the real file II, the file user inputs a file access request to that effect from the terminal device 14b. When an access request is input from the terminal device 14b, the processing device 2b accepts the input, performs the processing from step 21, and performs the file search processing.

In the processing unit 2b on the file user side,
Upon receiving an instruction to extract the contents of data X from the user TARO in 21, in the next step 22, the data X received from the management information file (not shown) corresponds to the third, fourth, and fifth records in the real file II. Is determined. Next, in step 23, mapping information on the file user side (mapping information 35 on the database device 3)
, It is determined that the corresponding record corresponding to the data X corresponds to the data record of the access unit names a and b of the virtual file A. Next, in step 24, a request to read the records a and b of the virtual file A is issued to the file provider.

That is, the processing device 2b on the file user side determines that the contents related to the data X correspond to the third, fourth, and fifth records in the real file II, and further determines from the mapping information 35 in the database device 3. Real file II record
Read that Nos. 3, 4, and 5 correspond to a and b of the virtual file A, and use the communication control device 1b on the file provider side to access unit names a and b of the virtual file A existing in the database device 61. Issue a request to read the record data.

The file provider receives a file reading request in step 25, and searches a file user list from the request in step 26. Next, in the determination process of step 27, the user TARO
It is determined whether or not there is a virtual file A among the virtual files that can be read. In step 28, records 1, 2, 3, 4, 5, 6, 7, 8 of the real file corresponding to a and b of the virtual file A are extracted and returned to the file user side. Meanwhile, step 27
If there is no A in the virtual file from which the TARO can be read, the process proceeds to step 29 and returns "file search refusal" to the file user side.

That is, on the file provider side, from the file user list 71 in the database device 7, the user TA
Confirm that virtual file A exists in the group of virtual files that RO can search, and records 1, 2, 3, 4, 5, 6, 7, 8 corresponding to access unit names a and b of virtual file A from the mapping information.
From the real file II of the database device 52,
The records 1, 2, 3, 4, 5, 6, 7, and 8 are returned to the file user. If the user TARO cannot access the virtual file A, the file search is not performed, a file search refusal is returned to the file user, and the process is terminated on both the file user and the file user.

Upon receiving the record returned from the file provider in step 30, the file user temporarily stores the data of the received record numbers 1 to 8 in the database device 4 in the next step 31. Then, in the next step 32, only the records 3, 4, and 5 desired by the user TARO are extracted, and the data of the records is displayed on the terminal device 14b.

In addition, the virtual file A that the user HANAKO can read and the user
The mapping information of the virtual file A that can be read by TARO is different, and the mapping information can be freely created for each file user. This is managed by the file user list 71. For example, by changing the information on the correspondence between the real file name in the mapping information corresponding to the virtual file A readable by the user TARO, the name of the minimum accessible unit in the virtual file, and the data record of the real file, Users can easily change the files that TARO can read. In this case, the mapping information of the virtual file A that can be searched by the user HANAKO is not changed.

As described above, according to this embodiment, for a searchable virtual file for each file user, the file provider and the file user have mapping information between the virtual file and the real file, By managing the searchable virtual file name for each file user and the mapping information corresponding to the virtual file, the file provider can access a part of the file using FTAM. Further, the mapping information can be easily changed. As described above, since a large number of real files can be mapped to one virtual file, efficient file search can be performed.

Further, since a large number of file providers exist in the network system, for example, in the case of not according to the present embodiment, the file user has to be aware of the large number of mappings for each file provider and perform a search. According to the present embodiment, the file user does not need to be aware of a large number of mappings, and can perform a file search with a unified interface.

As mentioned above, although the present invention was explained concretely based on an example, the present invention is not limited to the above-mentioned example.
It goes without saying that various changes can be made without departing from the scope of the invention.

〔The invention's effect〕

As described above, according to the present invention, according to the present invention, mapping information indicating a correspondence between a virtual file and a real file,
Since the file providing terminal device creates a file user list corresponding to each file user and distributes the mapping information, the access right of the file using terminal device can be managed by the file provider. In addition, the file providing terminal device creates mapping information between the real file and the virtual file having the desired data according to the request of the file user, and distributes the information to the file user. By managing mapping information corresponding to each file user, when a search request is received from a file user, data in an actual file can be extracted according to the mapping information. Thus, the file user can easily search even a part of the data, and the file user can easily retrieve desired file data from the file providing terminal device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a network system according to an embodiment of the present invention. FIG. 2a is a block diagram of a main part for explaining file processing of a communication control processing device that performs processing on a file provider side. Fig. 2b is a block diagram of a main part for explaining file processing of the communication control processing device for performing processing on the file user side, and Fig. 3 is a file search between the file user side and the file provider side. It is a flowchart which shows the flow of a process. In the figure, 10: network, 11a to 15a: communication control processing device, 11b to 15b: terminal device, 11c to 15c ... file device, 3, 4, 7, 51, 52, 53, 61, 62 ... … Database device, 1a, 1
b: Communication control device, 2a, 2b: Processing device, 71: File user list, 35, 72: Mapping information.

Claims (2)

(57) [Claims] 1. An inter-network file search processing system for searching for file data between network systems to which each terminal device is interconnected and transferring the searched data, wherein the file providing terminal device includes And mapping information indicating the correspondence between the file and the real file, corresponding to each file user according to the file user list, and a means for distributing the mapping information to the file using terminal device. An inter-network file search processing system comprising means for searching for a desired file specified by a file user based on the mapping information and accessing the desired file of the file providing terminal device. 2. The file search processing system according to claim 1, wherein the file providing terminal manages the mapping information based on the file user list and changes the mapping information for each file user. An inter-network file search processing system, characterized in that: