EP0443038A1
Expired / Lapsed
EP
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Temporary center system in a decentralized data base system
Assignee: Fujitsu Ltd
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Filing: 1990-09-11
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Granted: —
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Expires: 2010-09-11
Abstract
Abstract A distributed data base system is formed by a pluality of terminal units connected in a public network or a private network, each terminal unit stores respectively the real data and a temporary center for storing the one or a plurality of control information among various pieces of control information such as contents corresponding to each real data, keyword or command assigned to data and moreover check information set up for acquiring security is provided as the one of the terminal unit. A terminal unit utilizing data obtains identification information of termial units storing relevant real data by inputting contents, commands or keyword by making access to the temporary center and reads or extracts the necessary real data through the network from a terminal unit having real data based on such identification information but is capable of restricting users (terminal units) which are allowed to read the open data in accordance with a degree of importance of data. This temporary center, when it is assigned to the one terminal unit forming a distribute data base system, executes the control by gathering necessary control information from each termnal unit. This center having control information may be realized also by the one termial unit but a center may be provided individually corresponding to the items of information to be controlled and moreover the structure is also provided so that a center may be stablished and the center may be altered to the other terminal unit from the terminal unit having the function of the center.
Inventors
- 👤 Tadamitsu 1-604 Konandai Kotohausu Ryu
- 👤 Yoshio Mogi
- 👤 Takanori Fukatsu
- 👤 Gen Kakehi
- 👤 Masahiko 421 Fujitsu Dainiyurigaokaryo Murakawa
- 👤 Mamoru Endo
- 👤 Mitsuhiko Yamagata
- 👤 Katsuo Sato
- 👤 Akira Hashimoto
- 👤 Hiroshi 458 Fujitsu Shimonogeryo Araki
- 👤 Yasumasa Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 20:34
CPC Classifications
G; G06; G06F; G06F16/00; G06F16/20; G06F16/27; G06F16/275; Y; Y10; Y10S; Y10S707/00; Y10S707/953; Y10S707/959; Y10S707/964; Y10S707/966
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A temporary center system in a distributed data base system consisting of a plurality of terminal units connected to a network, wherein; the one of terminal units connected to the network is set as a center (4a) for controlling contents; a data offering terminal unit for opening the data to the other terminal units stores the details of data generated in the self file and notifies the contents and terminal unit identification nubmer to said center (4a); said center (4a) registers contents notified from each data offering terminal unit to a contents file and controls such data; a user terminal unit requests the contents to said center when it requires data, when only one is selected from the all contents obtained, the user terminal unit makes access to the data offering terminal unit; and the data offering terminal unit retrieves detail data corresponding to contents requested from the user terminal unit and transmits such data to the user terminal unit.
Claim 2
Dependent Claim
122 words
A temporary center system in the distributed data base system according to claim 1, wherein; the center (4a) for cotnrolling contents sequentially stores revised contents of data base opened by users sent from the data offering terminal units into a temporaryjob file (51), said contents are given the revision number for each preset period and such revised contents are transferred to a content control file (52); and when the revision number of contents is reffered from a user terminal unit for requesting opening of contents, insufficient number ofrevisions after the latest revison number of the self terminal unit opended by said terminal unit is extracted from said content revision number control file and then it is transmitted to a user terminal unit.
Claim 3
Dependent Claim
86 words
A temporary center system in a distributed data base system according to claim 1, wherein; When the open content is requested to said center (4a), all open contents and each owner number sent from said center are received, a terminal unit compares the received owner number with a user number of relevant terminal unit and the corresponding open content is stored in the content control file for the other terminal unit provided in the terminal unit only when such owner number matches with the user number.
Claim 4
Dependent Claim
129 words
A temporary center system in a distributed data base system consisting of a plurality of terminal units connected in a network, wherein; the one of terminal units connected to the network is set as the command control center (4b); the data offering terminal unit for opening data to the other terminal units stores detail of the data generated in the self file and notifies the command and terminal unit identification number to said center (4b); said center (4b) registers and control the commands and terminal unit identification information notified from each data offering terminal unit to a table; and a user terminal unit requests data, when necessry, to said center using the command and makes access to the data offering terminal unit using the terminal unit identification information obtained.
Claim 5
Dependent Claim
90 words
A temporary center system in a distributed data base system according to claim (4), wherein; a command control center (4b) is provided with a table registering common commands assigned to incorporated data groups stored in the data bases of the one or a plurality of terminal units and terminal unit information storing each data of said data groups; and a terminal unit using a command obtains the terminal unit information stong data by issuing enquiry to said center (4b) and thereby corresponding data groups may be obtained using said command.
Claim 6
Dependent Claim
102 words
A temporary center system in a distributed data base system according to claim (4), wherein; a terminal unit is provided with a means for assigning commands for expressing thedata stored in the self terminal unit and equalizing different commands as required; a terminal unit makes enquiry for existence or not existence of the commands equalized to the one command to said center (4c) in the processing of one command in the one terminal unit; and the relevant terminal unit processes the real data expressed by the one command and the commands equalized thereto in accordance with the response from said temporary center.
Claim 7
Dependent Claim
132 words
A temporary center system in a distributed data base system according to claim (1), wherein; a content control center (4a) is provided with a content list table (57) containing information for reading opend data, a reading condition table including open data items and a first rank designated for such items and a control information table (55) including the identification information of terminal unit (individuals) which can read open data and the second rank granted to the relevant terminal unit (individuals); and when readng request is issued from the terminal units designating said identification information and data, said first and second ranks are collated from said reading condition table (56) and control information table (55) and reading of said contents list table (57) is allowed to relevant terminal unit for the predetermined case.
Claim 8
Dependent Claim
100 words
A temporary center system in a distributed data base system according to claims 1 to 7, wherein; a group is formed with a predetermined plurality of terminal units in the terminal units connected to the network and a center for controlling data distributed and stored in the relevant group is also provided; said center retrieves the distributed dat bases on the basis of the request issued from the terminal units of said group; and the request issuring terminal unit makes reference to said data bases which must be distributed and stored on the basis of the result of said retrieval.
Claim 9
Dependent Claim
171 words
A temporary center in a distributed data base system according to claim 8, wherein; a group formed by said predetermined terminal units is provided a plural numbers (A, B) and centers (4A, 4B) for controlling the data bases distributed and stored in respective groups are provided in each group; an intergroup control terminal unit (7) for controlling said plural data bases distributed and stored (A, B) is provided; said each center retrieves the data base within the group on the basis of the request from the terminal unit within the group to which each center belongs; said intergroup control terminal unit (7) retrieves the data base belonging to the group other than the group to which said temporary center blongs on the basis of the request from said each center; and the terminal unit which has issued a request makes reference to the data base of the group other than that to which relevant terminal unit belongs on the basis of the result of retrieval by said intergroup control terminal unit.
Claim 10
Dependent Claim
116 words
A temporary center in a distributed data base system according to claims 1 to 9, wherein; a terminal unit is provided with a control information processing aprt for processing predetermioned items of control information for controlling data base and a control information file for storing said predetermined items; said terminal unit stores information about items of said control information; and said control information processing part becomes a center for gathers relevant predetermined items from said plural terminal units and stores such items to said control information file after generating declaration for controlling said data base to the other terminal units and also controls the datra base about the relevant items using the relevant control information file.
References Cited (Backward Citations)
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