Numeric Identifiers

AutoLISP functions work with numeric identifiers (IDs). Their type is real.

For example, when you use ade_dslist to list the drawings attached to the current drawing, the function returns a list of IDs, not drawing names. To get a drawing name, you call ade_dwggetsetting with two arguments: "dwgname" (the setting you want to know about) and the drawing ID.

Topology function documentation uses a number of different kinds of IDs. See Topology IDs for an annotated list. Although these IDs are all the same type, ade_id, we give them different names in the documentation according to their purpose.