| 摘要 |
Various methods for synchronizing incompatible databases using a history file containing records representing records of one of the databases at the time of a previous synchronization. A method allows synchronizing databases in which different techniques are used for storing a recurring event. A database in which the recurring event is, for example, stored as a single recurring record can be synchronized with a database in which the same recurring event is stored as a series of individual records. Another method permits comparing records from two different databases where at least one of the databases is subject to rules of data value to which the other database is not subject. The rules of data value are applied to the comparison so that their effect is neutralized and a meaningful comparison can be made. The rules of data value of one database can be used to change copies of the records of the other database. A further method allows synchronizing at least a first and a second database each containing dated records such as events, where the records of the first and second databases are synchronized across a narrow date range narrower than the date range of the records of at least one of the databases. Another method allows synchronizing two or more databases with a single database. In that case, for example, synchronized records are tagged with database identifying codes which indicated the database from which the records originated. |
