27.10.5 Widgets

There are several structural widgets between the terminal EmacsFrame widget and the top level ApplicationShell; the exact names and types of these widgets change from release to release (for example, they changed between 19.8 and 19.9, 19.9 and 19.10, and 19.10 and 19.12) and are subject to further change in the future, so you should avoid mentioning them in your resource database. The above-mentioned syntaxes should be forward- compatible. As of 19.13, the exact widget hierarchy is as follows:

INVOCATION-NAME            "shell"       "container"     FRAME-NAME
x-emacs-application-class  "EmacsShell"  "EmacsManager"  "EmacsFrame"

where INVOCATION-NAME is the terminal component of the name of the SXEmacs executable (usually ‘sxemacs’), and ‘x-emacs-application-class’ is generally ‘Emacs’.