GitLab

(nxml-parent-document-set): A function to set `nxml-parent-document'.
(nxml-mode): Define using `define-derived-mode' instead of `defun'.
(nxml-mode-hook): Remove `defcustom' (auto-defined by
define-derived-mode').
* lisp/nxml/rng-valid.el (rng-dtd-trivial-p): Add a helper function for
users who want to call `nxml-parent-document-set'.