To set up file-based download, you create a file-definition database. This is a SQL Anywhere database that has the same synchronization tables and publications as your remote databases. It can be located anywhere. This database contains no data or state information. It does not have to be backed up or maintained; in fact, you can delete it and recreate it as needed.
The file-definition database must include the following:
the same publications as the remote databases, as well as the tables and columns used in the publication, the foreign key relationships and constraints of those tables and columns, and the tables required by those foreign key relationships.
a MobiLink user name that identifies the group of remote databases that are to apply the download file. You will use this group MobiLink user name in your synchronization scripts to identify the group of remote databases.