Config for nXML-mode in Emacs 23.1

(require 'rng-loc)
(setq rng-schema-locating-files
      (list* "schemas.xml"
             (u:in-elisp-dir "user-nxml-schema/schemas.xml")
             (remove "schemas.xml" rng-schema-locating-files-default)))

(setq auto-mode-alist
      (cons '("\\.\\(xml\\|xsl\\|rng\\|xhtml\\|plist\\|keylayout\\|sdef\\)\\'" . nxml-mode)
            auto-mode-alist))
;; 
(setq magic-mode-alist
      (remove-if '(lambda (x) (member x '(xml-mode html-mode sgml-mode)))
                 magic-mode-alist :key 'cdr))