System and method for generating file updates for files stored on read-only media

摘要

This invention relates to file updating methods, and more particularly to file updating methods for files stored on Read-Only media. To represent modifications to a set of data objects the method according to the present invention comprises generating a baseline of a first version of a set of data objects; identifying the differences between a second version of the set of data objects and the first version of the set of the data objects; generating update information corresponding to the identified differences, said update information including references to segmented portions of said baseline that correspond to said identified differences regardless of location of said segmented portions in said baseline; and storing the update information whereby the update information may be retrieved and used to generate the second version of the said of data objects from the first version of the said of the data objects.