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1. 发明授权

US5897633A System for converting programs and databases to correct year 2000 processing errors 失效
标题翻译：用于转换程序和数据库以纠正2000年处理错误的系统
公开(公告)号：US5897633A
公开(公告)日：1999-04-27
申请号：US150005
申请日：1998-09-09
申请人： Daniel A. Nolan
发明人： Daniel A. Nolan
IPC分类号： G06F9/44 , G06F17/30
CPC分类号： G06F8/78 , Y10S707/99936 , Y10S707/99942 , Y10S707/99943
摘要： A method of modifying programs and databases having abbreviated date fields to achieve year 2000 compliancy includes examining an original database to ascertain the location of date fields, creating a supplementary PALM file that includes fully expanded date fields representative of corresponding date fields in the original database and modifying instructions or modules of the original program to access the PALM file for date information instead of the original database. The PALM file contains fully expanded date representations of abbreviated date fields of the original database. The PALM file also includes record identifiers and field identifiers to enable the modified program to access the required date information. Portions of the program requiring modification are identified by scanning for keywords that are generated from an examination of the database and/or from field layout definitions. The program is also examined for related keyword constructs or redefinitions found in the program itself. When converted, the modified program accesses the PALM file for date processing and accesses the original database for other processing steps. Further, a representative database having expanded date entries may be created based on examining a sample of an original database, and used by a modified legacy program to attain year 2000 compliancy.
摘要翻译：修改具有缩写日期字段的程序和数据库以达到2000年兼容性的方法包括检查原始数据库以确定日期字段的位置，创建补充PALM文件，其包括表示原始数据库中对应的日期字段的完全扩展的日期字段，以及修改原始程序的指令或模块以访问PALM文件以获取日期信息，而不是原始数据库。 PALM文件包含原始数据库的缩写日期字段的完全扩展日期表示。 PALM文件还包括记录标识符和字段标识符，以使修改的程序能够访问所需的日期信息。需要修改的程序的部分通过扫描从数据库的检查和/或从现场布局定义产生的关键字来识别。该程序还会检查相关的关键字构造或在程序本身中找到的重新定义。转换后，修改的程序访问PALM文件进行日期处理，并访问原始数据库以进行其他处理步骤。此外，可以基于检查原始数据库的样本来创建具有扩展日期条目的代表性数据库，并且由经修改的遗留程序使用以获得2000年的符合性。

2. 发明授权

US5809500A System for converting programs and databases to correct year 2000 processing errors 失效
标题翻译：用于转换程序和数据库以纠正2000年处理错误的系统
公开(公告)号：US5809500A
公开(公告)日：1998-09-15
申请号：US879613
申请日：1997-06-20
申请人： Daniel A. Nolan
发明人： Daniel A. Nolan
IPC分类号： G06F9/44 , G06F17/30
CPC分类号： G06F8/78 , Y10S707/99936 , Y10S707/99942 , Y10S707/99943
摘要： A method for processing or modifying programs and databases containing abbreviated date fields to achieve year 2000 compliancy includes examining an original database to ascertain the location of date fields, creating a supplementary PALM file that includes fully expanded date fields representative of corresponding date fields in the original database and modifying instructions or modules of the original program to access the PALM file for date information instead of the original database. The PALM file contains fully expanded date representations of abbreviated date fields of the original database. The PALM file also includes record identifiers and field identifiers to enable the modified program to access the required date information. Portions of the program requiring modification are identified by scanning for keywords that are generated from an examination of the database and/or from field layout definitions. The program is also examined for related keyword constructs or redefinitions found in the program itself. When converted, the modified program accesses the PALM file for date processing and accesses the original database for other processing steps. The method enables a computational system to determine the periods between dates in a non-ambiguous manner and yet advantageously uses the original database to retain system compatibility.
摘要翻译：用于处理或修改包含缩写日期字段的程序和数据库以达到2000年符合性的方法包括检查原始数据库以确定日期字段的位置，创建补充PALM文件，其中包括表示原始对应日期字段的完全扩展日期字段数据库和修改原始程序的指令或模块，以访问PALM文件以获取日期信息，而不是原始数据库。 PALM文件包含原始数据库的缩写日期字段的完全扩展日期表示。 PALM文件还包括记录标识符和字段标识符，以使修改的程序能够访问所需的日期信息。需要修改的程序的部分通过扫描从数据库的检查和/或从现场布局定义产生的关键字来识别。该程序还会检查相关的关键字构造或在程序本身中找到的重新定义。转换后，修改的程序访问PALM文件进行日期处理，并访问原始数据库以进行其他处理步骤。该方法使得计算系统能够以非歧义的方式确定日期之间的周期，并且有利地使用原始数据库来保持系统兼容性。

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