Dominique de Waleffe <[EMAIL PROTECTED]> writes:
> I need to view/edit ontologies in OWL syntax (XML files).
> I use an owl-mode which puts ("\\.owl$" . owl-mode) in front of
> auto-mode-alist.
>
> However when I view those ontologies, the magic-mode-alist specified
> function (xml-mode) is called because of the <?xml token on the first
> line. So I find my file visited in xml-mode instead of the owl-mode..owl is not a valid extension for Web-Ontology files. It was rejected by the OWL WG. A valid extension for Web-Ontology files is .rdf (and media type is application/rdf+xml). The best way to identify Web-Ontology files is to check whether file contents has the string "http://www.w3.org/1999/02/22-rdf-syntax-ns#"; or "http://www.w3.org/2002/07/owl#";. However, I agree that it is too confusing when you want to add a new extension-to-mode rule, and Emacs ignores your settings. There should be an additional level of settings where auto-mode-alist takes precedence over magic-mode-alist. For example, the recommended checking order for MIME types guessing is the following: 1. If a MIME type is provided explicitly (eg, by a ContentType HTTP header, a MIME email attachment, an extended attribute or some other means) then that should be used instead of guessing. 2. If no explicit type is present, magic rules with a priority of 80 or more should be tried next. These rules have a very low false-positive rate. 3. If there is still no match, the glob rules should be applied to the name to get the type. 4. If no glob rules match, the remaining magic rules should be tried next. The first rule corresponds in Emacs to the `-*-...-*-' construct at the beginning of a file. The second rule corresponds to `auto-mode-interpreter-regexp' rather than to `magic-mode-alist' since `auto-mode-interpreter-regexp' has lower false-positive rate than `magic-mode-alist'. The third rule is `auto-mode-alist', and the fourth rule is `magic-mode-alist'. So perhaps the best solution is to change the checking order to: 1. -*-...-*- 2. auto-mode-interpreter-regexp 3. auto-mode-alist 4. magic-mode-alist and to remove filename checking rules for html-mode, sgml-mode and xml-mode from auto-mode-alist. Or at least to mark them somehow specially in the auto-mode-alist (with an additional list element) that would tell Emacs to check these rules later (at an additional 5th step) when checking `magic-mode-alist' fails. -- Juri Linkov http://www.jurta.org/emacs/ _______________________________________________ Emacs-pretest-bug mailing list [email protected] http://lists.gnu.org/mailman/listinfo/emacs-pretest-bug
