What are spatial object identifiers (or foreign identifiers) in SDTS?
Every spatial object in an SDTS transfer has a unique identifier. The identifier is formed by combining a module name with a record identifier separated with a “#”, for example “LE12#35.” The module records are the structures that represent the spatial objects in an SDTS transfer. Every module must have a unique name in an SDTS transfer and every record must have a unique record identifier within its containing module. Combining the module name and record identifier yields a unique identifier for every module record within a single SDTS transfer. SDTS calls this a “foreign identifier.” Foreign identifier fields permit one module record to reference another module record (in the same or another module) in the transfer. This permits a Polygon Module record to reference a Line Module record as part of its boundary.
