# mime.types Chawan uses the mime.types file to recognize certain file extensions for matching mailcap entries. See the [mailcap](mailcap.md) documentation for a description of mailcap. ## Search path Chawan parses all mime.types files defined in `external.mime-types`. If no mime.types file was found, the built-in mime type associations are used. The default search path for mime.types files is: ``` $HOME/.mime.types:/etc/mime.types:/usr/etc/mime.types:/usr/local/etc/mime.types ``` ## Format The mime.types file is a list of whitespace-separated columns. The first column represents the mime type, all following columns are file extensions. Lines starting with a hash character (#) are recognized as comments, and are ignored. Example: ``` # comment application/x-example exmpl ex ``` This mime.types file would register the file extensions "exmpl" and "ex" to be recognized as the mime type `application/x-example`. ## Note Chawan only uses mime.types files for finding mailcap entries; buffers use an internal mime.types file for content type detection instead. The default mime.types file only includes file formats that buffers can handle, which is rather limited (at the time of writing, 5 file formats). Therefore it is highly recommended to configure at least one external mime.types file if you use mailcap.