What is the difference between the baseline and the update (recordschangedsince) downloads when using the DFClient?
The baseline download is a snapshot of our data. When it is downloaded, it will contain 4 files: artwork.txt, categories.txt, category_def.txt, and keywords.txt. The artwork.txt file contains all of the artwork records, categories.txt contains a mapping of artwork to categories, category_def.txt contains a list of all categories, and keywords.txt contains a mapping of artwork to keywords. When an update (recordschangedsince) download is performed, the same files are created, but a “CH_” is appended to each file with the exception of the category_def.txt file, which still contains a list of all the categories. The “CH_” files only contain data for artwork records that were modified since the requested date.
