Data processing: database and file management or data structures – Database design – Data structure types
Patent
1996-11-21
1999-09-28
Feild, Joseph H.
Data processing: database and file management or data structures
Database design
Data structure types
704 10, G06F 1721
Patent
active
059604492
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Art
The present invention relates to a database system shared by multiple client apparatuses connected thereto by a network, and more particularly a database system that effectively takes into its database duplicate data redundantly created by client apparatuses and a method of constructing the database. Further, the present invention includes application to character processors.
2. Background Art
A database system connects to itself multiple client apparatuses, for example personal computers, through a network, and the client apparatuses share a database. Such a database system is well-known.
In a database system of this kind, data necessary for a user is sometimes not registered in the shared database. In such a case, the user creates its own data file using the memory of a client apparatus for individual use.
However, considering the whole system, the creation of individual data files on the part of users involves inefficiency described in the following.
It is a waste of resources as well as of time and labor, if multiple users own data of the same content redundantly in their data files. Further, a shared database becomes huge, and utilization efficiency declines, if all data supposed to be necessary is registered in the shared database beforehand to avoid such waste.
For example, consider a translation system in which a number of terminal computers are connected to a server computer that has a shared dictionary for translation. In this case, translation in various professional fields can be made possible, if the server computer has dictionaries specialized for various professional fields. However, all of these dictionaries are rarely used. Nevertheless, the dictionaries kept in the server system are often still insufficient in their contents, within an individual professional field. For example, natural science has many fields such as biology, medical, chemistry, mechanical, electrical, and electronics, etc. Further, each of these fields is further divided into many fields. Moreover, each field itself varies as research develops.
Therefore, such a demand for comprehensiveness is limitless, and the dictionaries of the server side cannot accommodate it. On the other hand, it is an exceedingly heavy burden for the users side to be completely equipped with their own dictionaries.
SUMMARY OF THE INVENTION
The object of the present invention is basically to solve the above problems in a database system shared by multiple apparatuses.
In order to achieve this objective, the present invention expands the server database by utilizing individual databases created in client apparatuses by themselves. That is, the server's database apparatus searches data registered in the users' databases, called user databases hereafter, to judge whether a particular data record should be registered in the server database. The criterion for the judgment may be the degree of importance or a feature amount given by the users for the record. The criterion also may be the degree of redundancy or the frequency in use of the record, or a combination of these two or three criteria.
Here a feature amount of a record is a parameter that adds a meaning that is different from the information of the record, for example, the degree of importance that each user can arbitrarily determine for the record, the frequency in use how often each user has accessed the record, or the number of registrations how many users have stored the record in user tables as data for individual use.
In any case, some records in user databases, which are worth being registered in the server database are taken into the server database, and the records registered in the server database are deleted from user databases. Each user database can effectively use its memory by these means.
According to the present invention, therefore, data of greater needs for the users can be effectively taken into the server database, so that the server database becomes enriched for sharing. As a result, effective use of the server database
REFERENCES:
patent: 4771385 (1988-09-01), Egami et al.
patent: 5060184 (1991-10-01), Sakai
patent: 5079701 (1992-01-01), Kuga et al.
patent: 5682543 (1997-10-01), Shiomi
Hayashi Masaaki
Kuwari Seiji
Matsuo Ayato
Nagaoka Hiroshi
Yamashita Yasunari
Feild Joseph H.
Omron Corporation
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