Data processing: database and file management or data structures – Database design – Data structure types
Patent
1998-01-08
2000-11-07
Black, Thomas G.
Data processing: database and file management or data structures
Database design
Data structure types
707 1, G06F 1730
Patent
active
061449695
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an information processor, a method of information processing, and a recording medium recorded a file name conversion program thereon, which are suitably applied to have file names recorded, for example, on a write-once disc recording medium accessed by a plurality of operation system.
PRIOR ART
Conventionally, as operation systems (OS) for computers, there are, for example, System 7.5 (trademark) for Macintosh, MS-DOS (Microsoft Disk Operating system) (trademark) and Windows (trademark) of Microsoft, Unix (trademark), and so on which have their own specifications. Files created on each of the plurality of operating systems are mutually accessible among these operating systems.
However, when a file name is to be set to a file under the control of a certain operating system, the operating system requires a kind of permitted characters and a limited number of characters limited by its own specifications as well as predetermined attributes given to the file, as shown in FIG. 46. For this reason, for reading a file managed by an operating system (A) from a computer managed by another operating system (B), the computer requires the user to somehow convert the file so as to be readable on the operating system (B), so that the laborious conversion is forced to the user.
For example, comparing the specifications for a file name provided by System 7.5 of Macintosh and MS-DOS of Microsoft, System 7.5 of Macintosh allows to designate a file name up to a maximum of 31 characters, while MS-DOS of Microsoft only allows to designate a file name up to a maximum of eight characters and additional three characters of extension.
The difference in the specifications regarding to a file name between the two operating systems causes the inability of MS-DOS to manage a file given a name such as "abcdefghijklmnopqrstuvexyz" on System 7.5 which is the operating system of Macintosh, as illustrated in FIG. 47. As a result, although a file name of 31 characters may be used on System 7.5, a file must be given a name of eight characters and an extension of three characters also on System 7.5 only for reading the file on a computer running MS-DOS, thus forcing a significant inconvenience to the user.
As described above, the conventional file management method individually manages files created on a plurality of registered different operating systems without considering differences in the specifications among these operating systems, so that the user must take part in the file management. However, a problem arises that the user cannot create a file commonly usable among a plurality of operating systems unless he knows the difference in the specifications of the respective operating systems.
In addition, even the same operating system may give rise to a problem when it has different versions. For example, even if a Japanese file name can be given to a file on a version of an operating system which supports display in Japanese language, the Japanese file name cannot be referenced on a different version of the same operating system which does not support a Japanese environment or a version which does not have a function of displaying Japanese characters. Thus, even under the same operating system, the user suffers from complicated handling of file names. Specifically, file names must be previously unified in a single character set such as alphabet or the like in consideration of languages supported by different versions of the same operating system.
Further, the respective operating systems may set identical attributes to files but in a different management method. Thus, even if a write to a file is disabled on a certain operating system, a write to the file may be enabled on a different operating system.
The present invention has been made in view of the problems mentioned above, and its object is to propose a recording/reproducing apparatus and a file management method therefor which facilitate the file management among different operating systems.
DISCLOSURE OF THE INVENTION
The pres
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Inokuchi Tatsuya
Kaneko Yasuyoshi
Taira Kazuhisa
Udagawa Osamu
Black Thomas G.
Coby Frantz
Sony Corporation
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