sgml-mode-hook

sgml-mode-hook is a variable defined in `sgml-mode.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
Hook run after entering (quote (sgml-xml-mode XML SGML)) mode.
No problems result if this variable is not bound.
`add-hook' automatically binds it. (This is true for all hook variables.)

You can customize this variable.