TNM INED Object Format
The tkined(1) editor distinguishes between various object types. Every
object has a unique identifier, called its id, which is used to access
and manipulate this object.
Exchanging the id between tkined(1) and the Tnm extension would be sufficient
to implement all of the commands below. However, this would not be very
efficient because an application often needs to access a set of standard
To reduce communication costs, an external object representation of
the various object types is used which allows caching some information
in the Tnm extension.
The external object format is a Tcl list. The first element in this
list contains the object type and the second element the id of the object.
The following list elements depend on the type of the object as described
To extract elements out of the external object format, you should always
use one of the ined commands. Although not stated explicitly, all the commands
that return information which is included in the external object format
accept the external format as a single argument and return the requested
value as extracted from the external format.
By using these commands, you never need to access the external format
directly. This makes your scripts usually more readable and makes sure
that your scripts continue to work even if the format changes in a future