Pre-defined initial and demo data is loaded into an application database via DMX files. This data is installed into the database when a system is first set-up, or when a system is upgraded. A set of initial and demo data is provided in the application. Customers may also need to add their own initial and/or demo data.
In order to avoid clashes with the initial and demo data that is shipped in the application and with data created by the runtime system, it is important that the identifiers (e.g., primary keys) for customer initial and demo data are drawn from reserved ranges. Therefore, a set of ranges has been reserved for customer use.